Fedora 34 is as bleeding edge desktop as it can be.
Maybe you have more recent xdg-utils version?
I run 1.1.3 here.
Maybe you have more recent xdg-utils version?
I run 1.1.3 here.
Maybe what's missing is the libreoffice package? It seems like all these types are provided by /usr/share/mime/packages/libreoffice.xml on my system (which is read by update-mime-types).
Arguably this is a common enough format that you shouldn't really need libreoffice installed to have it, though I would think any other office program would have it. I think /etc/mime.types serves as the ultimate fallback, though it doesn't have entries for libreoffice file extensions on my system.