in the mean time I'm stuck just like you in the world of linux. My primary desktop pc for the past 9 months was my galaxy note 8 with a usb c to hdmi adapter. it has an incredible chromebook like UI when docked and has all the linux tools i need! I've even been able to write an app and submit it to the app store all from there. You really cant go back after you've tried one device life and it makes filming and editing content for my youtube channel seamless since video never leaves the 256gb SD card inside my phone.
Huawei has a similar mode and i cant wait for google to support it. they do natively support windowed mode and moving apps freely but i mean just add a chromebook ui to the screen when u dock a pixel 3 and you will be golden :)