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.[1] She made her senior debut with the team in 2019, making four appearances in Division 1, the third highest league in Sweden.[citation needed] In December 2020, Sandberg signed for Damallsvenskan team KIF Örebro,[2] 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.
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.[6] 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.[7]
International career
Sandberg took part in the first qualifying round for the European Championship in October 2021 with the U19 team and was able to qualify with the team for the second round.[citation needed] They qualified for the finals at a tournament in Croatia in April 2022, where they lost 1–0 to Spain in the semifinals.[citation needed] From September 2022 she was used in the U23 team.[citation needed]
On 16 February 2023, she made her senior debut in the 4–1 win over China, playing all 90 minutes.[8] On 13 June 2023, she was named to the squad for the 2023 FIFA Women's World Cup in Australia and New Zealand,[9] the youngest player in the squad.[citation needed] She made her World Cup debut on 2 August 2023, starting in the final group stage game, a 2–0 win over Argentina.