As per mentioned thread, is it possible to trust certificates and identities that comes along with p12 certificates through MDM?

@ryanollos Did you create Individual API Key or Team Key?

Recently I got a message from my organization saying "All apple accounts needs to be managed by them". As part of that I transferred my account and was needed to change the country. Can this cause any issues in notarization?

Yes. I'm a member of Apple Developer Program