afaik, funkwhale and navidrome have overlapping usecases, but don't have the same goals. funkwhale with its federation features wants to be more than a web player for your library
Yes, although I don't use the federation features from Funkwhale. I just enjoy its clean and awesome interface. Funkwhale is a joy to use and fits very well my music habits (listening to selected albums instead of all over the place - though this is supported too, of course).
I pair Funkwhale with Snapcast-Mopidy-Iris stack, in case I want to have multi-room audio or listen to other sources, beyond my own library.