In april 2019, the the French national organization for standardization (AFNOR) released both an improved AZERTY and a BÉPO layout. That version of xkeyboard-config have them. It's a really nice improvement of the mess that is AZERTY and although it may be too late for many, supporting its diffusion through Solus would certainly give many other the opportunity to learn typing with a more sensible keyboard layout.
I'm really sorry 😞 🙇 I just realised I provided the wrong source: It should have been https://www.x.org/releases/individual/data/xkeyboard-config/xkeyboard-config-2.28.tar.gz . And therefore update to 2.28 would be a more appropriate request… (corrected)