One two of our phones, both iPhone Xs, when IoS updated from 12.X to 13.1.3, there is no voicemail listed in "Voicemail." That is, when you click the green "phone" icon, then on the lower right, the "Voicemail" icon. The icon that is in row with "Favorites," "Recents," "Contacts," "Keypad," and "Voicemail."
If i dial voice mail they are there, how do i get it back? This is very inconvenient to say the list.