Problem with apt repository

Hello, I have a problem with my apt repository.
Many packages come back to me as untraceable.
Lately I saw Minetest which no longer works and is not found on the apt repository.
On the minetest forum the community assures me of the availability of Minetest in ARM64 on the Ubuntu repository.
Following their advice I tried to compile it but again a lot of packages are missing.

E: Le paquet « cmake » n'a pas de version susceptible d'être installée
E: Impossible de trouver le paquet libxxf86vm-dev
E: Impossible de trouver le paquet libgl1-mesa-dev
E: Impossible de trouver le paquet libsqlite3-dev
E: Impossible de trouver le paquet libogg-dev
E: Impossible de trouver le paquet libvorbis-dev
E: Impossible de trouver le paquet libopenal-dev
E: Impossible de trouver le paquet libcurl4-gnutls-dev
E: Impossible de trouver le paquet libfreetype6-dev
E: Impossible de trouver le paquet libgmp-dev
E: Impossible de trouver le paquet libjsoncpp-dev
E: Impossible de trouver le paquet libzstd-dev
E: Impossible de trouver le paquet libluajit-5.1-dev
E: Impossible de trouver de paquet correspondant à l'expression rationnelle « libluajit-5.1-dev »

here is the list of my repositories :
deb http: //ppa.launchpad.net/ubuntu-pi-flavour-makers/ppa/ubuntu focal main

Solution found, poor manipulation of sources has made the other sources used by UM disappear on the RPI.
A reinstallation of the image and everything is back to normal.