Most of these types of catalog sales are back catalog only. Bieber's is too:

"In any event, the far-reaching buyout encompasses a “100% interest” in London, Ontario-born Bieber’s publishing (“including the writer’s share of performance”), on top of the artist’s masters and neighboring rights for his more than 290-work back catalog. The latter specifically includes the two-time Grammy winner’s projects that released before December 31st, 2021."

https://www.digitalmusicnews.com/2023/01/24/hipgnosis-song-m...