2017 Maggio turned senior in 2017. She made her debut at the
2017 City of Jesolo Trophy where she placed twenty-fourth. She next competed in the 2nd Italian Serie A where she placed first. She was later selected to represent Italy at the
European Championships. While there she qualified to the All-Around final where she finished in sixth place. She competed at the next Italian Serie A competition and once again finished in first place. Maggio continued her dominance, winning the Italian Gold Championships and placing first on three of the four apparatuses. Maggio was poised to compete at the
World Championships, however she sustained a knee injury while training that ended her season prematurely.
2018 Maggio returned to competition in June, competing at the 3rd Italian Serie A where she finished 8th in the all-around. The following month she competed at the Italian National Championships where she placed fourth in the all-around, won gold on balance beam, and placed fifth and sixth on uneven bars and floor exercise respectively. Later that month Maggio re-injured her knee and would be unable to compete at the
European Championships nor the
World Championships.
2019 Maggio returned to competition at the
2019 City of Jesolo Trophy. She placed 17th in the all-around and fifth on balance beam. She competed at the Italian National Championships where she won silver on balance beam behind
Giorgia Villa. She placed sixth in the all-around and on uneven bars and floor exercise. On September 4 Maggio was named as the alternate for the team to compete at the
2019 World Championships in
Stuttgart,
Germany. At the
team final Italy won the bronze medal – Italy's first team medal since the
1950 World Artistic Gymnastics Championships. As the alternate, Maggio was also awarded the medal.
2020–21 Maggio competed at various Serie A competitions in the beginning of 2020; however most competitions were canceled or postponed due to the worldwide
COVID-19 pandemic. In November Maggio competed at the Italian National Championships. She finished third in the all-around behind
Giorgia Villa and
Asia D'Amato. During event finals she won gold on balance beam, silver on uneven bars behind Villa, and placed sixth on floor exercise. Maggio competed at the 1st Italian Serie A of 2021 where she placed first. In April Maggio was selected to represent Italy at the
European Championships in
Basel alongside
Alice D'Amato,
Giorgia Villa, and
Vanessa Ferrari. Maggio qualified to the all-around, balance beam, and floor exercise event finals. During the all-around final Maggio finished in sixth place. During the apparatus event finals Maggio finished fifth on balance beam and fourth on floor exercise. Maggio was named to the team to represent
Italy at the 2020 Summer Olympics alongside
Alice and
Asia D'Amato and
Giorgia Villa (later replaced by
Vanessa Ferrari). The team qualified for the team finals and placed fourth with a total score of 163.638.
2022 Maggio competed at the
DTB Pokal Team Challenge. Her scores on vault, balance beam, and floor exercise contributed towards Italy's second-place finish. Individually she won silver on balance beam behind
Konnor McClain. Maggio next competed at the
City of Jesolo Trophy. She helped Italy finish second as a team and individually placed third in the all-around behind McClain and
Asia D'Amato. During event finals she once again finished second on balance beam behind McClain. In June Maggio competed at the
Mediterranean Games alongside
Angela Andreoli,
Alice D'Amato,
Asia D'Amato, and
Giorgia Villa. Together they won gold in the team competition, over five points ahead of second place France. Individually Maggio won gold in the all-around. at the
2022 European Championships Maggio next competed at the
European Championships. On the first day of competition she won bronze in the all-around behind compatriot
Asia D'Amato and
Alice Kinsella of Great Britain. Additionally Maggio helped Italy qualify to the team final in first place and individually she qualified to the floor exercise final. During the team final Maggio contributed scores on vault, balance beam, and floor exercise towards Italy's first place finish. After teammate
Asia D'Amato was injured during the vault final, Maggio was substituted into the balance beam final where she finished fourth. During the floor exercise final Maggio finished second behind
reigning European floor exercise champion
Jessica Gadirova. In October Maggio competed at the Italian National Championships. She placed first in the all-around, on uneven bars (tied with Villa), on balance beam, and on floor exercise. She was later named to the team to compete at the
World Championships in Liverpool alongside
Giorgia Villa,
Alice D'Amato,
Manila Esposito,
Veronica Mandriota, and alternate
Elisa Iorio. While there she helped Italy finish fifth as a team. Individually Maggio qualified to the all-around final and was a reserve athlete for the uneven bars and floor exercise finals. She finished ninth in the all-around and was able to compete in the floor exercise final after teammate D'Amato withdrew; she finished sixth. Maggio next competed at the
Swiss Cup alongside
Nicola Bartolini. While there they finished second behind the American duo of
Addison Fatta and
Yul Moldauer.
2023–2024 In early 2023 Maggio competed at the
Cottbus World Cup where she finished fifth on the balance beam. In the summer Maggio underwent surgery on her foot and missed the
2023 World Championships. Maggio returned to competition
2024 Doha World Cup but she failed to make any event finals. She competed at the Italian National Championships where she placed fifth in the all-around. She was selected as an alternate for the
2024 Olympic Games. == Competitive history ==