Every so often I check who's building phones for #Linux.
#Volla has ones with VollaOS and/or Ubuntu Touch, with #multiboot options, and a tablet.
PinePhone and FairPhone don't seem to be viable for ...
I bought an used OnePlus6T with the same porpouse. In first instance I've installed PostmarketOS with Gnome and I'm impressed with tha app ecosystem and user experience. It's need to be more permormant but It's really promissing.