Last Saturday my phone started saying "cannot read battery meter" and the battery meter shows a question mark in the middle of it. After changing, the battery drains completely in a couple of minutes. The only way to use the phone is while it is plugged in.
I'm so sorry that you are having trouble with your Pixel 4XL battery! We are here to help, and we want to get it working once again. Do you happen to have another charger you can try in the device? If so, please try the other charger in a different outlet, and see if the device will be responsive to charging. Let us know if this helps, or if you continue having trouble. We want to make sure this is resolved for you.