Yes it’s possible. I don’t know Fedora, it works without any problem on Arch. Plasma 6.1 I think.
It’s not answer you want but I’ll say it anyway: I use FolderSync, it works without any problem.
my 13 years old laptop works good as server. Sometimes he fell asleep when I watch a movie with Jellyfin but it’s okey.
Yes. Espanso.