For both Web Apps and the Focus mode, the top bar that holds the close, minimise and expand buttons cuts off some of the page content when you hover over it. Just a minor issue but should be fixed for a more perfect experience eventually. Example below of when in Focus mode and hovering over the top bar, it cuts off a small part of the kagi logo in the top left of the page.

I think either a permanent small padding to the top or a dynamic padding that only applies when hovering over the bar to shift the page down ever so slightly would be a good fix.
Version 0.99.130.3-rc (WebKit 621.1.2.111.4)
Sequoia (15)