Early batches of S6 V1.2 boards didn't have the EEPROM populated on the board. Later batches have, as 2 of mine I am having here. One is running nicely in a Hiprecy LEO 3D printer. The installed EEPROMs are 4kB, unlike the 2kB stated in the schematics.
You should be able to order S6 V2.0 in Hiprecy store at AliExpress. However, I am having the opposite experience as JohnSC....he ordered V1.2 and got V2.0. I ordered a V2.0 and got a V1.2 :-) Hiprecy promised me to send me a V2.0 and I am waiting patiently now.