Why are all apps not on GitHub/FDroid?

Why are some Proton apps not avaliable on GitHub/FDroid? Will they be in the future? I want to have all my apps update from Obtainium. But Proton makes me have to still use Aurora for a few apps.

Some users want to DeGoogle completely. Thats not possible with Proton. Will this ever change or is it how they want it to be?

Thank You