Commenting on other people's suggestions:
I think Sia could work. I'm not sure which would work best together/for skating, but I like The Greatest, Cheap Thrills, Chandelier, Elastic Heart.
I love Bittersweet Symphony and I could see them doing it, but it's not really uptempo or uplifting. The version the did on the TV show Riverdale is pretty, but the original is maybe a bit more uptempo, so maybe that could work.
I don't know if I see Believer (Imagine Dragons) for them -maybe, not sure. But it's a great song and I think it works for skating. And it can be mashed up with another Imagine Dragons song for the tempo change. I like Radioactive and Thunder.
No idea if There's Nothing Holding Me Back (Shawn Mendes) would work for skating, but I love the song and could see it for them. I really like Hideaway (Kiesza) for them as well.
I like the idea of 42nd Street, but that also sounds like something that could work for the Rhythm Dance in 2019-20.
My ideas:
Maybe Start a Fire by John Legend. Demi Lovato's Lionheart or Neon Lights.