Yea I was surprised how well it ran on the Pixel 3a on their site it says it s the most supported device for ubuntu touch. Never tried PostMarket or Arch but I should give Arch a try thanks.
Another company that makes these cool little laptops is GPD. GPD Win Max 2 is a pretty sweet device for a small laptop plus gaming. Has oculink port which allows fast external gpu support. 2 ssd slots can run windows on one for gaming and linux on other for computing. Even has a 4g modem attachment
OneNext and GPD have been making some cool devices.
https://www.indiegogo.com/projects/gpd-win-max-2-handheld-gaming-pc-7840u-64gb-ram#/