Verizon website says:
"Is there a way to access my Voice Mail messages without having to enter my password each time?
Yes, you can reformat the Voice Mail number on your phone to automatically include two pauses and your password. Once you’ve made this change, you won’t have to enter your password to listen to your Voice Mail messages."
But it doesn't say how to do reformat the number and I can't find instructions on the site. My phone is a Google Pixel.