They are in an early stage still, but from what I could take in, I think that their approach can work. The only thing that gives me pause (knowing the app ecosystem) is the 5.5" 16:9 display (see also https://www.reddit.com/r/dawndrumsdev/comments/1k18zcv/divine_d_next_generation_gnu_linux_phone/msgrq0d/).
It's definitely nice to see a phone designed in Africa (Tunisia)!