What you are looking for must be Copperspice: https://www.copperspice.com/ It checks all your boxes, since it is a hard fork of Qt, but doesn't use the moc and only an open source licence. Since you haven't even tried to explain why you won't use Qt, it is a little difficult to help with an alternative.
That being said, it really sounds like what you are looking for is Qt 🤷
Som indbygger i ~~Aarhus~~ ~~Århus~~ Aarhus vil jeg mene at der er mange andre ting der ville give mere mening at fokusere på(ingen nævnt ingen glemt) , både for de folkevalgte, skolelærerne og elever (og andre).