Pine64.org has announced a 10.3" 1404x1872 e-ink device with Wacom layer to be available later this year for $399. This will probably be a work in progress for quite some time after initial release, so anyone wanting a polished product ready for prime time doesn't need to read any further. But anyone interested in user freedom might want to keep an eye on progress. (And, of course, the priority of open drivers means the CPU and GPU won't have top tier performance.)
https://www.pine64.org/2021/08/15/in...-the-pinenote/
https://wiki.pine64.org/wiki/PineNote