Even if it's wasn't clear before now it's pretty clear - you must buy commercial license if you want to be on App Store. There was Qt license change[1] in January 2016 and there is no longer LGPLv2.1 licensed version since Qt 5.7.

Only option for commercial software currently is LGPLv3 and it's doesn't allow tivoization.

[1] https://subsurface-divelog.org/2016/02/subsurface-mobile-for...