Is there an archive of ipas that would work on the version of iOS that this is emulating?

I was just thinking about this because of the Nintendo server shutdown and it feels similar for iOS apps that only worked on previous versions or require specific servers to hit - wondering if a lot of these older apps & services will just be lost. Even services working today would have the same issue a decade from now if there’s not some standard to archive the data & api layers as well as the apps themselves.