I fail to see what a CBDC and/or Fed sanctioned stablecoins would achieve for entities outside the US that need to transact in USD. It would essentially work the same as today under a new name?

The point of a CBDC is government control over an increased share of the money supply. Pretty irrelevant to USD balances held by other central banks.

The point of a stablecoin for an entity with an American banking license is... nothing?