Ubuntu 22.04 LTS has been released. This new Long Term Support LTS version of Ubuntu has an updated Linux Kernel and a new Graphics Display Driver Model. This gives support for Thunderbolt Docks and now High DPI Laptop Touchscreen Screens can be used alongside standard DPI External Monitors. For a 2 in 1 Convertible Touchscreen Device, the rotation sensor and touchscreen work out of the box and the inbuilt browser Firefox now works well with Touchscreen and the Touchscreen Keyboard which now includes emojis.
Unfortunately at the time of writing there is an issue with the Chromium Browser and pressing into a text input field such as the address bar or search bar will not bring up the Onscreen Keyboard. This bug is also inherited in Chromium based browsers such as Google Chrome. Hopefully it will be addressed soon.
I have put together a detailed Ubuntu 22.04 LTS Installation Guide here: