OK so I will answer myself and I hope others can benefit from this as well:
-
Download the regular x64 Ubuntu Mate 22.04 LTS ISO and install the OS with it: https://ubuntu-mate.org/download/amd64/jammy/
-
Once the installation is finished apply the tweaks for Pocket 3 on top:
sudo apt install git
git clone https://github.com/wimpysworld/umpc-ubuntu.git
cd umpc-ubuntu
sudo ./umpc-ubuntu.sh enable
This will install all the scripts/tweaks you would have like if you used the modified 21.10 ISO for Pocket 3
- Reboot and enjoy the Pocket 3 optimized Ubuntu Mate LTS
All the credit goes to @Wimpy and the team making the tweaks available on Github: https://github.com/wimpysworld/umpc-ubuntu