Thanks for the update! Curious, is there anything specific in terms of which platforms you're seeking testing help on (e.g. older macbooks, newer haptic touch macbooks, synaptics-based sensors)?
There's plenty of work just implementing the basic handling of touchpad gestures, not even talking about any kind of polish. So at this moment we just assume that libinput handles touchpad gestures well and don't test at all. Once the basic parts are done we'll start polishing and this is when we'll test on as much hardware as possible.
[1]: https://bill.harding.blog/2020/06/22/linux-touchpad-project-...