Love Focus Mode, use it almost exclusively. Since the latest update I am having trouble selecting menu items at the top of webpages, although the browser toolbar is hidden and doesn't appear to be interfering. Links are not clickable within about 30px of the top of the window, example from this forum: 
Fixing this would help keep Focus Mode useful, e.g. I like to manage my email in Proton Mail in Focus Mode, but either I shouldn't or I should only use keyboard shortcuts for the time being to avoid repeatedly collapsing the browser window into Dock. 🙂
Version 1.0.6 (145), WebKit 624.1.7
Tahoe (26)