The “docker installation method” was never deprecated. It was Home Assistant Supervised that was intended to be deprecated but then that decision was cancelled.
It’s vital that you use the correct terminology to avoid confusion. For example, there’s no official term called “Hass OS”. You are probably referring to “Home Assistant OS” which is a recommended installation method. Also, saying it’s “not docker” can also be confusing because Home Assistant OS actually uses docker. I believe you meant to say your installation method is not Home Assistant Container.
For future reference: