Wåhlin played in the World Junior Curling Championships in 2014, 2015, 2017 and 2018 as a member of Team Isabella Wranå. In 2014, her team of Wranå, Elin Lövstrand, Almida de Val and Fanny Sjöberg had a fourth-place finish, after they lost in the bronze medal game to Russia. In 2015, she and teammates Wranå, Wåhlin, Johanna Heldin and Johanna Höglund again finished fourth after this time losing to Switzerland in the bronze medal game. She was back at the event in 2017 where her team won the gold medal, defeating Scotland's Sophie Jackson in the final, and lost just two round robin games in the process. The next year the same team went undefeated in the round robin, but ended up losing to Canada's Kaitlyn Jones in the final. This team also represented Sweden at the 2017 Winter Universiade, where they took home the bronze medal. Wåhlin represented Sweden one more time at the juniors in 2019 as second for Tova Sundberg. They placed sixth.[3]
After the 2021–22 season concluded, Wåhlin decided to step back from competitive curling. She returned briefly in 2023 as Team Wranå's alternate when they represented Sweden at the 2023 European Curling Championships.[22] There, they finished third through the round robin with a 6–3 record, earning a spot in the playoffs. They then lost both the semifinal and bronze medal game to Italy and Norway respectively, finishing fourth.[23] Wåhlin played in one game against Germany where the team won 8–5.[24]
Aside from Team Wranå, Wåhlin has also been the alternate for the Anna Hasselborg rink. She has been to two world championships with them, winning a silver medal in 2018 and won an Olympic gold medal at the 2018 Winter Olympics. Wåhlin didn't play any games however.
Mixed
In 2016, Wåhlin played third on the Swedish team at the 2016 World Mixed Curling Championship. With skip Kristian Lindström, second Joakim Flyg and lead Johanna Heldin, the team went undefeated through the round robin to qualify for the playoffs as the top ranked team. They then beat New Zealand, Japan and Scotland to qualify for the final. There, they fell 5–4 to Russia's Alexander Krushelnitskiy, earning the silver medal.[25]
Wåhlin returned to the mixed championship seven years later in 2023 with a new team of Johan Nygren, Fredrik Carlsén and longtime teammate Fanny Sjöberg. The team dominated the round robin, again finishing as the first seeds with an 8–0 record.[26] They then beat Belgium in the quarterfinals and Canada in the semifinals, qualifying for the final. There, they downed Spain's Sergio Vez 8–2 to claim Sweden's first World Mixed title.[27]
