I did not see this suggestion already when doing a search here.
I was helping someone and have been working on my local drive developing something and went to help them understand the history of their model and discovered that I cannot activate the Manage Cloud Models button without being in a Cloud Model. This seems to be a miss to me, as I'm signed in, so then it has my permissions and tokens, so it should be available for me to access these models. I checked in Revit 2020.2.6 and Revit 2022.1 and both had the same limitation.