
Don’t know any nation that does, but also US already has FedEx, UPS, DHL and others. They could deliver letters if they wanted, but they don’t think that’s profitable.
The privatization looks like it’s essentially stealing all assets USPS has.
BTW there are protests about it https://nalc.org/march23 I recommend to attend them.
From what I understand that’s how USPS operates too. It generates enough revenue to be self sufficient and is not receiving any funding from the government.