Actually, there is at least one other company specializing in sustainable / repairable electronics - besides Fairphone - I’m aware of.
Check out Shiftphone: Their new Shiftphone 8 (still under development / construction) will be a pretty solid deal with a reasonable price-performance ratio - already pre ordered mine and very excited for final delivery in March.
… Their previous models as well as spare parts, etc. are also still available through their shop.