Configuration YAML access

I’m running core HA in a docker container on an Unraid server but planning to move it to a Home Assistant Yellow that I have on order. I’m now hearing that delays continue and not March has become August in terms of delivery. For the most part that’s okay but I really need to integrate my DSC alarm system which requires a manual edit to the config file. Is there any way to edit that file without the Supervisor version of HA?

Your configuration folder is mapped to a folder on that host, so you can use just about any tool you want - all it has to do is run as root since HA does.

If there’s no tool on Unraid itself then you can run another container like code server to edit those files.

That is not an accurate answer.
That indicates that the config would be stored inside the container. That also means that all config is lost each time you upgrade Home Assistant.

Noone runs HA like that. There is always a persistant data location that the docker image uses to store data which can also be accessed from the host OS

How did you install HA? Did you use a docker-compose file or did you specify the location in the docker command that starts HA?

Unraid has an application community store where many applications, tools and docker apps are found. Home assistant Core, found there is what I used. I have found that none of the custom or useful features are possible without YAML and these files only available with the supervisor version. As said in the OP the painful one is no alarm system integration.