I've heard good things about VanillaOS. Not used it myself though.
With their package manager apx, you can use software from pretty much any distro in VanillaOS (copied from link above):
Apx is a tool that allows you to generate work environments based on any Linux distribution and seamlessly integrates them with the system in a convenient way ...
While I use river as daily driver and am very happy with it, I feel people who like Hyprland will find river to be rather limited and barren in terms of looks and availability of plugins.