In gnome-terminal 3.36.2-1ubuntu1 (Groovy) the F10 selects (without "clicking") the New Tab button, for which a keyboard shortcut already exists. The shortcut can't be disabled from the gnome-terminal settings, not even disabling all the shortcuts by unchecking the "Enable shortcuts" checkbox.
I didn't test it personally, but according to LP: #1893118 this is an issue in Focal too.
In gnome-terminal 3.36.2-1ubuntu1 (Groovy) the F10 selects (without "clicking") the New Tab button, for which a keyboard shortcut already exists. The shortcut can't be disabled from the gnome-terminal settings, not even disabling all the shortcuts by unchecking the "Enable shortcuts" checkbox.
I didn't test it personally, but according to LP: #1893118 this is an issue in Focal too.