We don't know. The App Store review process is a black box for the most part. They are not super consistent in the way they apply their rules.
But how do apps like nostr:npub1tm99pgz2lth724jeld6gzz6zv48zy6xp4n9xu5uqrwvx9km54qaqkkxn72 get their app on the app store and they allow for us to plug in our own wallet on iOS ?
Discussion
Is there a technical description of what you submitted / link to source? I'm interested in doing similar things.