AnduinOS on a Dell XPS 15 9550 - right click ineffective

I installed AnduinOS onto an old Dell XPS 15 9550 yesterday. It has a touchpad mouse, not the more traditional two buttons below the touchpad. Right click seems to have exactly the same effect that left click does, not what it should do. I checked this with the 'test' facility in Settings and reports 'left click' when I right click. It works ok with Windows (10 or 11) or Linux Mint, even with ChromeOS although that needs the 'alt' key to make it work (I have requested an enhancement or fix from Google).

I couldn't figure out an alternative way of getting the normal right click functionality although admittedly I didn't spend a lot of time on it. I'm afraid I have put Mint back onto the partition for the moment... Thanks to Clonezilla for letting me do this reasonably easily.

Reproduce the issue on a Dell XPS 15 9550 running AnduinOS and use the Settings test facility to confirm how right-click input is reported. Done means the touchpad's right-click action is recognized as a right click rather than a left click.