So, I just found Papyr.
Raytac MDBT50 module with Nordic nRF52840 BLE/802.15.4 SoC
1.54 inch 200x200 pixel red/black/white epaper display - GDEW0154Z04
CR2477 coin cell holder
Having has no success with my question BLE5.1 with on-board eInk (or any kind of display), I will contemplate an alternative.
Let's swap the display for wearability. Is there a BLE 5.1 dev board with ...