That seems like a rather obviously wrong take. There were ample companies supporting Epic (or rather, fighting Apple) before they filed their lawsuit, which was also long before Epic acquired bandcamp.
08/2020 Epic files suit against Apple and Google https://en.wikipedia.org/wiki/Epic_Games_v._Apple
09/2020 Discussion of Epic vs. Bandcamp and app store fees: https://www.shacknews.com/article/120550/tim-sweeney-on-why-...
05/2021 "The trial ran from May 3 to May 24, 2021" from the same wikipedia link.
03/2022 Epic acquires bandcamp, a year after their trial. https://www.nytimes.com/2022/03/02/arts/music/epic-games-ban...
Why would Epic acquire bandcamp as a "pawn" to use a year after their trial concluded? It's far more reasonable to assume Epic had a legitimate business interest in Bandcamp, and if anything, the execs of the companies had started talking due to the (concluded) lawsuit and shared interest in not losing 30% of their revenue.