Yeah, mostly. It’s a third party UI that you’d use in place of (or alongside) any other. Works on mobile (optionally as a PWA) and desktop.
Not sure if lemmy.ca runs it directly, but the hosted instance is unlocked so that it can connect to any Lemmy instance.
The only one I can really see is !statistics@lemmy.world but it doesn’t appear to be active at all. The only moderator for it hasn’t posted anything in a year or so.
Looks like some “if you build it, they will come” is needed.
Not sure of the procedure, but you may reach out to the LW admins to see about taking over the community if the mod is confirmed AWOL.