No Voicemal

Greetings,
I will be grateful for any helpful piece of advice on the following problem.
I don't know when and how my voicemail stopped working.
I can access it by listening for information about the lack of a message.
However, callers have no signal and no greeting.
Thus, they are not able to record any messages.

Should call forwarding be enabled with forwarding to voicemail, its phone number?

Thank you in advance.

Moto G5 2024