My iphone 12pro max goes directly to voicemail and does not ring
Is it possible you have do not disturb mode enabled or airplane mode is on?
Oh, no! Dealing with service problems can be overwhelming, especially if you are encountering voicemail issues. Verizon is here to help.
When did the issue start? What recent changes have you made (software update, phone upgrade, etc.)? Aside from the voicemail, any other problems?
~Gilbert