This app was mentioned in 3 comments, with an average of 1.33 upvotes
Yes, here's the official play store app, but it shows it's incompatible with the Pixel (may need to view in a browser): https://play.google.com/store/apps/details?id=com.whitepages.nameid.tmobile
I tried downloading the application file and installing it manually but it didn't load past the "spinning wheel" icon. APK if interested: www.apkmirror.com/apk/t-mobile-usa/t-mobile-name-id/
This one doesn't work for you?
https://play.google.com/store/apps/details?id=com.whitepages.nameid.tmobile