@sirikon Try and get an app that isn’t consistent with Apple’s HIG onto the iOS or macOS App Stores. Also, on those platforms, since consistency is the norm, people would reject an inconsistent app even if Apple allowed it (or if it was distributed outside the store). It’s a matter of pride on those platforms for your icon to be consistent. On Linux, the norm – currently – is inconsistency.
This is my personal Mastodon.