Problem with iPhone Voicemail Transcript (voice to text)

My iPhone 8 Plus on T-Mobile and my girlfriend's iPhone X on AT&T are both having problems with Voicemail Transcription (voicemail to text) starting in late September.

We are on two different phones and two different carriers.

I have tried the following below on both iPhones

1) Restarting and forced resets of the iPhones

2) Upgraded the iPhones to IOS 16.1

3) Checked for carrier updates.

4) Turned on/off airplane mode.

5) Checked that voicemail forwarding is correct.

5) Reset Siri. Change language then set the language back to English US.

6) Changed the voicemail greeting and password.

7) Reset the network setting

Still, we are both not getting voicemail transcription (voicemail to text)

Is this a known issue?

Is there a fix?

Thank you for any help.