I’m posting this in case someone else has this issue.
I started posting this because I was at the end of my rope, I moved from a Pixel 7 Pro to a 9 Pro XL and the fingerprint / biometric option was there at first but after enabling, it didn’t work and disappeared.
I tried renewing my premium, logged out, logged in, uninstalled, reinstalled, added fingerprints, rebooted, searched this forum, searched the googles, nothing worked. Just as I was about to submit this as a request for help I went back to android fingerprint options and it turns out there is an android option to enable biometrics in apps (separate from fingerprint unlock), that has to be turned on.
To enable in android the following option needs to be enabled:
Settings->Security & Privacy->Device Unlock->Fingerprint & Face Unlock->Verify it’s you in apps
After this the Unlock with Biometrics option should be available.
Face unlock is still not working, I’ll create a separate post for that since I just wanted to make this searchable in case someone else has the issue.