I have the Wyze version of this robot, currently pulled apart in a bucket next to my desk. The newer robots based on the CRL-200S (including the Viomi V8, Xiaomi "STYTJ02YM", and my Wyze WVCR200S) have clamped down hard on ADB access, requiring a sequence of button presses to boot it into FEL mode in order to fire up the ADB port for half a second. But in over 200 attempts, I just have not been able to nail it down (dmesg tallies USB connections, pretty neat). I've spent far too long fiddling with the current board with zero success, so I ended up just buying another board for $15 off Aliexpress, from a Viomi V6/V7. Once it arrives, I'm going to root it before reassembling the robot just to make sure it actually works.
