A GNOME Shell Extension to more easily toggle the "disable touchpad while typing" setting.
GNOME Shell versions 40-46 are supported.
The extension can be installed directly from the GNOME Extensions website.
Download the latest release (v4 for GNOME Shell 40-42, v7 for 43-44) and run gnome-extensions install --force quick-touchpad-toggle@kramo.hu.shell-extension.zip.