A nice alternative to Lightroom is Luminar Neo.
It's a bit of an adjustment but I'm enjoying it.
Others are Darktable, RawTherapee and Capture One but I haven't tried any of those yet.
Luminar is paid but I believe RawTherapee is free.
Discussion
Yep have heard of all of those and I’ve tried Darktable. Different workflow and quite a learning curve plus a somewhat basic and clumsy DAM. I think I simply prefer Lightroom Classic’s DAM over all the others, some of which don’t even have one or don’t really work well.