information sharing

Very simple question: if I obtain US residency or citizenship, will my home country know about it? Opening a bank account as a US resident/citizen shouldn't trigger any reporting as I would be be considered a US person for tax purposes, which would be correct. I haven't lived in my home country...

Since March 2021 twelve countries now automatically share information on companies with no economic substance and where beneficial owners are non-resident. I think non-resident folk with companies in the below countries may be in for a letter from their tax man. Anguilla Bahamas Bahrain...