I say your 2020 UKS thread and the video also linked there, then looked at WIS.
Do you have the kit to do the pressure checking with Tech II ?
I note in the instructions there is a mention of "unsecuring" and "safety on" with the adapter. Perhaps it isn't a simple Schrader valve & there is someting on the adapter that allows the valve to operate to be able to read pressure.... to stop people like me & you simply depressing it to get sprayed in fuel
Rather than the multiple cleans, why not simply soak the sensor in a bath of fluid. I would be tempted to carefully clean it as well. Nothing stronger than a finger tip, so long as the fluid doesn't irritate you.
As to system cleaners, the best is Forte, last time I looked it was about £25 for a bottle, so probably £35 now, it's what the up market garages use, because it works
Final point. In the testing there are references to having a minimum fuel level of 12% and the DTC being set when you run out of fuel. I seem to remember you have a fuel gauge problem as well, perhaps one fault is falsely triggering another ?