> Not related to Stadia, but I had some issue with my Pixel 3a yesterday that it just stopped charging and had to get in touch with Google's support to try initiate a repair (turned out to be a software bug, thankfully).

Yes! Android 11 has difficulty on the Pixel 3a negotiating the USB mode and will just randomly fail to charge after updates. I found moving it between a USB C PD and USB C port on an actual computer will at least bring up the notification where you can then select the USB negotiation mode.