Ah, gotcha—yes, that is actually a pain point and a strange omission. If you need to run backend code for any reason to support your app, Apple literally offers nothing.
IBM at one point offered Swift "serverless" lambdas/cloud functions, which made me briefly hopeful that Apple could do the same, but that service was deprecated years ago, and Apple has shown no motion there.
IBM at one point offered Swift "serverless" lambdas/cloud functions, which made me briefly hopeful that Apple could do the same, but that service was deprecated years ago, and Apple has shown no motion there.