Upcoming SharePoint mobile beta testing - winding down

Is the number of sites under Frequent Sites fixed? For example, I can see four sites when there is capacity to show six sites. Is this value set by the Graph within certain parameters? In addition, the ellipsis?displays differently according to the site. Is this conditioned by site type (team, comms or hub site) or by permissions? Finally, on first run, highlighting the ellipsis would help discovery. There are plenty of examples of these useful callouts across SharePoint. Hope this helps as feedback. Enjoying the new app!