Two of Apple's platforms now count as gatekeepers under the DMA, which opens sideloading/alternative app stores for any developer who wishes to use them!
…but of course, virtually nobody will because of the toxic Core Technology Fee, which leaves a Sword of Damocles hanging over any business that dares to participate — the rules of which Apple can rewrite, at any time, in their favor. The consequences of which have already forced the @delta devs out of the App Store in the EU