That is an additional point I wasn't fully aware of. I've tinkered with Unity and they address every platform with every supported language.
Whereas I can do some desktop animation stuff with Godot without caring much (that's one of the reasons I'm interested in MIDI support), if I were to go beyond the hobby phase I'd definitely target iOS first...
It's on their list, and at the rate that they are moving, it will be there soon. It is based on Mono, so there shouldn't be too much friction there. Unity is good, but for Android and iOS I play with Raylib in C.