Switch to the previously active tab (last tab) by pressing Ctrl+Tab (macosOption+Tab), including last doc, script and scene tabs.

This is a regular editor plugin. Copy the contents of addons/previous-tab into the same folder in your project, and activate it in your project settings.

or plug with gd-plug:

plug("MakovWait/godot-previous-tab")

Godot4 editor plugin.

More plugins godot4-plugins