Örebro Sandberg started playing football at IFK Lindesberg and then she went on to play for
Adolfsbergs IK. Her first senior club was
Örebro SK Söder. She made her senior debut with the team in 2019, making four appearances in
Division 1, the third highest league in Sweden. In December 2020, Sandberg signed for
Damallsvenskan team
KIF Örebro, initially joining the club's under-19 side but made her debut with the first team on 13 March 2020, starting and playing 63 minutes in a 3–0 defeat to
Hammarby in the
Svenska Cupen. She made a total of 38 appearances for the club in all competitions.
BK Häcken In July 2022,
BK Häcken paid a
Damallsvenskan record transfer fee to
KIF Örebro for Sandberg. She made her
Champions League debut on 21 September 2022,
2022–23 Champions League qualifying, playing the full 90 minutes of both legs against
Paris Saint-Germain as Häcken lost 4–1 on aggregate.
Manchester United On 2 August 2024, English
Women's Super League club
Manchester United announced the signing of Sandberg on a three-year contract with an additional option year. The transfer fee was reported as a new record for a female Swedish player, surpassing the £150,000 Everton paid to
Rosengard for
Hanna Bennison in August 2021. On 3 October 2025, she scored her first goal for the club in a 1–1 draw against
Chelsea in the Women's Super League. She sustained a knee injury during United's 3–0 Champions League victory over
Atlético Madrid in February 2026, which manager
Marc Skinner announced would prevent her from playing for approximately 8 weeks. == International career ==