I'm not sure how my install works, as I just found a script that installed everything for me and it worked on different SBCs. However, when I look into "About", HA says the installation method is supervised. And according to the article, this is precisely what is going to stop being supported.

Home Assistant is deprecating two installation methods, meaning they will continue working for now, but support will end in six months with the release of Home Assistant 2025.12. This includes Home Assistant Core, which runs in a Python environment, and Home Assistant Supervised, which involves running your own operating system underneath Home Assistant.

This is what I do. I have an Orange Pi 3b as a file server but it also runs HA in a docker image on top of that. I guess I'll just wait and see if it stops working. If so I'll try to reinstall using whatever "new/official/supported" method they want, and if not working, I'll jut give up on HA.