Not able to access voicemail?

For several days this last week we were unable to access voicemails on our backup FreeUp lines. Anyone else experiencing this? It seemed to work fine today, but I'm wondering if this is more common on MVNO's?

Apparently AT&T customers have been experiencing VM problems for the past few weeks. Don't know whether or not this relates to the FreeUp VM problem, but since FU uses AT&T it seems a likely explanation.

https://downdetector.com/status/att/Outing/

Would this voicemail issue affect redpocket att and using YouMail?

Or is this just a att vvm issue?

Tia

I have the FreeUp free plan and I am able to access voicemail.