On Wayland an additional click is needed for GTK text entries to show the Screen Keyboard
Basically, under Wayland it often happens that some application's text entry is focused (with cursor blinking and all) but the Screen Keyboard doesn't appear unless you click the text entry an extra time compared to Xorg. It happens both when the focusing is done by the application itself, and when clicking the text entry directly to give it focus. Affected applications are Gedit, GNOME Files' location entry and Tor Browser's address bar entry. It does not happen with the search bar entry in the GNOME Activities Overview for whatever reason.
Edited by anonym