[7][8] Dahlien scored four goals with three assists despite making only five starts for the North Carolina Tar Heels as a freshman in 2022, being named to the Atlantic Coast Conference all-freshman team.

Despite missing a month for the 2024 FIFA U-20 Women's World Cup, she earned All-ACC third-team honors and made a team-joint-high seven assists, scored two goals, and drew six out of the team's ten penalties.

She was one of the youngest players selected to the under-20 roster for 2023 CONCACAF Women's U-20 Championship, scoring a hat trick in her youth international debut against Jamaica in the group stage.

She entered the starting lineup as the team finished as runners-up to Mexico, securing qualification to the 2024 FIFA U-20 Women's World Cup.

[17] Following a semifinal defeat to eventual champions North Korea, Dahlien forced a 119th-minute own goal in a 2–1 extra-time win over the Netherlands, helping the United States finish the tournament in third place, its best result since 2012.