The US has an incoherent assemblage of spare parts for an ID system and it's been years since I've seen the inside of a physical bank.
You have bank credentials and use them with with the bank. You have post office credentials and use them with the post office. This is far better from a security and privacy standpoint that any kind of centralized ID. If someone steals your post office credentials they can't drain your brokerage account, ransomware your employer's cloud services in your name and take out a home equity loan against your house and convert it into Bitcoin.
Centralized identity is a bug, not a feature.