I've received that message today. I'm from Belarus.
We noticed an issue when verifying your account. The legal entity information associated with your account fully matches a restricted party or one or more parties from the United States government's consolidated screening list, another government's sanctions list, or a restricted regions list.
I know nothing about sanctions but I'm 100% sure that's how sanctions should not work by discriminating developers from country which governments appeared in any sanctions list.
Finally all deactivated accounts were activated and everyone received apologize email from Apple.
You were mistakenly sent an email informing you that the legal entity associated with your Apple Developer account matched a restricted region. Your legal entity does not match the restricted regions list and we have corrected the error. Your developer account is now active and any associated apps and in-app purchases are once again available. No further actions are required on your part. We apologize for any inconvenience this may have caused you.