I assume you mean a Maui form designer. This is not in the current roadmap, nor very likely. see:
https://github.com/dotnet/maui/wiki/Roadmap
Cross platform apps are a lot of work no matter the toolkit used. Due to the different release cycle of the underlying O/S and changes in the native mobile sdks, The build chains are always in catch up mode.
A website / PWA may be a better choice for a non-profit.