[fossdd]

Not sure which device suits your criteria the best, but feel free to take a look at the supported Laptops/Tablets: https://wiki.postmarketos.org/wiki/Devices#Tablets_in_classi...

I heard the Xiomi Mi Pad 5 Pro had good support (https://wiki.postmarketos.org/wiki/Xiaomi_Mi_Pad_5_Pro_(xiao...), but we also support a lot of Chromebooks like your Duet 3 (https://wiki.postmarketos.org/wiki/Lenovo_IdeaPad_Duet_3_(go...) :p