From Tesla's own website: "NACS was originally developed by Tesla, deployed in 2012 with the first Supercharger and Model S vehicle and eventually published by Tesla in 2022 with the goal of industry-wide adoption."
https://www.tesla.com/support/charging/supercharging-other-e...
Tesla also has been operating on chargers for years! They took their own sweet time we just don't think about the first years!
Tesla never built standards. They just made something that sort of worked for them. That sort of somewhat helped some specific consumers find chargers, albeit with not enough status available to know what to expect when you got there.
None of that is at all good enough for actual infrastructure the world needs to be able to depend on. "Works for my car" isn't how gasoline works, and it's not how ev charging is gonna ever succeed.