0 - Remove any skins / bumpers / cases from the device.
1 - Lock and unlock the device.
2 - Toggle NFC mode.
3 - Reboot the phone.
I've seen some speculation that on the Pixel 4 it could also be due to some flexing in the case. During a two week period where I couldn't find my wallet I spent a lot of time trying to make it work because of Chase's allowing tap-to-authenticate on their ATMs. Out of 100+ tries using those work arounds and several different ATMs (in case that was the issue) it worked once.
I ordered a tile for my wallet since I can no longer rely on my Pixel 4 as a replacement credit card.
https://www.androidpolice.com/2020/10/26/tap-to-pay-issues-w...
The work arounds seem to be:
0 - Remove any skins / bumpers / cases from the device.
1 - Lock and unlock the device.
2 - Toggle NFC mode.
3 - Reboot the phone.
I've seen some speculation that on the Pixel 4 it could also be due to some flexing in the case. During a two week period where I couldn't find my wallet I spent a lot of time trying to make it work because of Chase's allowing tap-to-authenticate on their ATMs. Out of 100+ tries using those work arounds and several different ATMs (in case that was the issue) it worked once.
I ordered a tile for my wallet since I can no longer rely on my Pixel 4 as a replacement credit card.