Hello all, We received a message from Amazon asking us to verify our phone number and was wondering if anyone has received anything similar?

We had followed the instructions as we contacted seller support and they confirmed it was real. It did give us a bit of a fright about the suspension warning.
We received this email after sending the last 4 digits.

But going to that link "Get Started", it only goes to an error page on seller central:

We contacted account health support about it and we asked them if it seemed legitimate. They said they wouldn't know as seller support handles two step verification. We then asked seller support and they said it was a real message and to wait 24 hours for the technical issue to resolve itself.
But looking more closely at it, it all does seem a bit weird. For one, the emails didn't come from an @amazon email. It was the other way around - it was amazon@ and then the rest of the email address. (I don't believe it will let me type it out here), Secondly, the logo for the profile picture in the second email is an S at the top left? Shouldn't it be the Amazon arrow logo like all the other emails people receive? And why would they give a link to account health support if account health support has no idea about it? There was also no performance notification, just the email. I know those are small things and seller support did say it was real several times, but it is giving weird feelings as our account says our phone number was already verified before this. We changed our password and made sure the deposit method wasn't altered just in case.
Has anyone experienced this before? If it is real, what could we do if that technical issue does not get resolved in 24 hours? If it isn't real, what else could we do to protect our account security?
Thanks for any advice.