EndeavourOS is the real Arch, with some additional repos and some sensible defaults.

How does it compare to hyprland in it’s current state regarding stability, features and support?

it doesn’t even host it’s own repos

Yes, and that’s a good thing, otherwise it would be like Manjaro.

EndeavourOS is perfect if you already know your way around a Linux system but don’t want to spend the time and effort to setup Arch.