Nobilio had a successful amateur career across Europe. She won the 2016 and 2017 International Juniors of Belgium, the Italian U18 Team Championship in 2015, 2017 and 2019, the Italian Ladies Stroke Play Championship in 2019 and 2020, and the 2020
Portuguese Ladies Amateur. Also, she was runner-up at the Italian Ladies Amateur twice (2016 and 2019), at the 2016 Austrian Ladies Amateur, and lost the final of the
Spanish Ladies Amateur twice, in 2017 to
Frida Kinhult of Sweden and in 2019 to Candice Mahe of France. In 2018 she was runner-up at the
German Girls Open, one stroke behind
Ingrid Lindblad, and in 2019 runner-up at the Internazionali d'Italia Femminili U18. She placed 5th at the 2019
Girls Amateur Championship after finishing as the leading qualifier for the match play stage. At the
World Junior Girls Championship in Canada, she won the team gold in 2018 and lost a playoff to Seo-yun Kwon in 2017 for the individual title, was runner-up two strokes behind
Atthaya Thitikul in 2018, and was third in 2019, again behind winner Thitikul. Nobilio won the
girls' individual silver at the
2018 Summer Youth Olympics after prevailing in a playoff against
Emma Spitz of Austria and
Yuka Saso of the Philippines. She represented Italy at the
European Girls' Team Championship each year between 2015 and 2018, winning in 2016 and 2018, and the
European Ladies' Team Championship between 2019 and 2024. In 2022, she beat
Caley McGinty 3 & 1 as Italy lost to England in the final. Ranked as one of the best juniors in Europe, she represented the continent in the
Junior Solheim Cup and
Junior Ryder Cup, as well as the
Junior Vagliano Trophy and the
Vagliano Trophy. Nobilio reached the number three spot in the
World Amateur Golf Ranking and in 2020 accepted a golf scholarship to
UCLA where she was a business economics major. However, due to pandemic restrictions she wasn't able to start her freshman year in person at UCLA and missed out on her first year on the
UCLA Bruins women's golf team. She played in the
2020 U.S. Women's Open and the 2021
Ladies Italian Open, where she finished tied 21st. She was top female in the 2021 Roma Alps LETAS Open, a mixed event staged jointly by the
2021 Alps Tour and the
2021 LET Access Series. Nobilio was runner-up in the 2023 Finnish Amateur Championship, behind Katri Bakker, and was runner-up behind
Patricia Isabel Schmidt in the 2024
Ahlsell Trophy, a professional event. ==Professional career==