Works:
Samsung KLMBG4GEND-B031 (32GB)
Toshiba THGBMBG8D4KBAIR (32GB)
Samsung KLMCG8GEND-B031 (64GB)
Works - with LineageOS, but not with prototype firmwares:
Micron MTFC128GAZAQJP-AAT (128GB)
Samsung unmarked eMMC 5.1 prototype (256GB)
Doesn't work - driver incompatibility:
FORSEE NCEMASLD-64G (64GB)