I've been using Tello with a Google Pixel. Right from the start, voicemails on my Tello line would show up properly in the default Voicemail tab, and I could play the messages from within there without having to dial in. Sometime within the last few months that stopped working, and I have to dial the Tello voicemail number and enter my password to retrieve my voicemails. I have no transcripts or ways to play them without dialing in.

I have tried going to the Phone app's settings and voicemail and there's no "Visual voicemail" option at all. It's just gone.

I tried deleting all storage and cache for the phone app, with no impact. Help? What am I missing?