I have (had?) a Google Voice number that I started using for work stuff about a dozen years ago. One day 8-9 years ago, it just disappeared from my google account. Like gone.
I go to google voice settings, and it's telling me to sign up for google voice. Nothing I do can get this back - my voice number is now just anchorless, floating in the digital sea.
The crazy thing is, it still forwards to my cell number to this day. I can't change most settings for it, so I stopped handing that number out, but every once in a while I'll get an email notification of a new voicemail or text message to that number...