The pots are about 10 kohm each, they are wired internally in parallel, and i got a reading of 4.7K on the connector.

I have not yet found, what company makes these, where to buy replacements, and what the part number is.  It seems, Nintendo Switch uses a very similar component, but its cable is different (has a 90-degree turn).

Just in case, i have no drift problems yet, my quest2 is two months old, and it works perfectly. I was just curious, what thumbstick to look for, and what is the technology. Initially upon seeing it being different to one in RiftS, i hoped it's a capacitive or magnetic or optical... Unfortunately, it's just the usual potentiometer of questionable reliability.