https://github.com/frappe/builder
Visual website designing + publishing, built on Frappe Framework
Here is a talk by Dr Mwogi on implementing at one of Kenya’s largest public hospitals https://youtu.be/yL6akPy2X5c?si=4UzUSJYm3PjxA3hL
Twenty was almost what we needed. It was extremely easy to set up, the customization is very promising, and the REST API worked ok.
The main issue is that it was pretty alpha-version, and I ran into quite a few small issues that just just made it not quite work for us. Either way, I'm keeping an eye on it, and will re-evaluate again at some point. Hopefully it keeps its customizability.
Never found anything more suitable, though.
Would highly recommend the books to anyone who is still wondering - the torrent of raw humanness coming out from those books is, for a better word, brilliant.