[3] She made her professional debut on 2 June 2018, scoring a consolation goal in a 3–1 loss against Kvarnsvedens IK in a Swedish second-division match.

[19] In February 2024, NWSL club San Diego Wave FC announced the signing of Lundkvist from Atlético Madrid in exchange for an undisclosed transfer fee.

[20][21] She made her club debut in the NWSL Challenge Cup on 15 March 2024, playing a full 90 minutes in a match against NJ/NY Gotham FC.

The Wave would go on to win the match 1–0 on a goal from Alex Morgan, marking Lundkvist's first piece of silverware with her new club.

[31] In November 2020, Lundkvist was called up to Sweden's national under-23 squad for the first time for a camp including an unofficial friendly against Kopparbergs/Göteborg, but withdrew before it started.

[35] In February 2023, Lundkvist made her senior national debut, playing 76 minutes for Sweden in a friendly match against China in Marbella.

[37] The following month she was withdrawn from the squad due to an ankle injury that occurred while warming up ahead of a friendly against the Philippines.