I believe the default is multitouch. For example my touchpad is one big button, rather than having separate left and right click buttons.
- If I click the touchpad with one finger it’s a left click.
- If I click the touchpad with two fingers it’s a right click.
I also want to note that the in Rocky 9 the Gnome settings app’s Accessibility settings has a “Simulated secondary click” feature.
If you hold down left click, after a second or so you’ll get a right click instead:
