The user sync from Qobuz to Roon is asynchronous and does not happen immediately. I find it usually syncs within 10 minutes or so normally. Would not surprise me if it takes somewhat longer during peak user periods like on holidays, etc. Just have to be patient. Things you add in qobuz via Roon should take right away normally although if Roon itself is heavily loaded that may take a tad longer than normal as well.
I had a large music library already when I started with Roon and the load from Roon digesting all that for the first time was heavily resource intensive for a few days so some slowness with Roon initially processing a large library for the first time may also slow things down for a bit. Hope that helps.