definitely an issue! I mean, if Apple says “get lost” to semiprofessional apps, not built with xcode, then I’d rather make an app via xcode. One could complain about this approach by Apple, but I mean they will just do it anyway.
I fully trust in the capable @thunkable team and will wait patiently for their statement on this. An alternative, that comes to my mind is thunkable X being [android] + [cloud based Progressive Web App]