The thing stopping them from putting it on iOS devices was probably the fact that Apple would take a chunk off the top through App store fees.

Just like Microsoft does on Xbox.

EU just ruled that they can fuck themselves and alternative storefronts must be made available on the platform.

No, they didn’t. For now the only thing the EU ruled is that Apple is one of six(?) digital gatekeepers. No consequences for now. Some consequence will come but it’s not a straight ruling to allow competing app stores as you claimed.