I think this might have more to do with the beating that Epic took from Apple in court. The 2021 decision in favor of Apple, of their lawsuit for anti-competitive behavior was upheld this year. That was not cheap to litigate that and was a major loss for Epic.
I think the Bandcamp sell off is a good indicator of all of this. Epic obtained Bandcamp in March 2022, to explicitly have their IAP system integrated into it. Google shut them down and told them they would start collecting the 30% usual due. Epic filed suit and Google gave them an exception for the time being with the agreement that 10% would be held in escrow until the conclusion of the trail. With many of the arguments in the Apple case similar to Google's case, I'm pretty sure Epic sees the loss coming from a mile away.
All in all, what I think can be drawn from this. Epic made a big bet on "their store" and that's fading away with mobile devices locking people into a marketplace that is "distinctly not Epic". While putting such a bet wouldn't normally kill a company, Epic sextupled down on it and I think how hard they went for "their marketplace" is what's done them in.