I have had my controller sitting in the charging dock for over an hour now and it appears to be fully charged. When I try to turn it on nothing happens though. It won’t connect to the PS5 and doesn’t even turn on the white lights when I click it.
This might be an issue with the internal workings of the controller that have caused the PS button to stop working. I have put a pretty detailed guide together for this if you want to debug the PS button not working on the Dualsense controller.