In some ways, using the Supervised on Debian method also limits what you can do. You aren’t supposed to install any additional software in Debian, and if you do and face an issue, you will only be able to rely on community support (which is 95% of support anyways).
I would suggest you start using the official NUC image. It’s a great way to run HA and there are many add-ons that run within the HA environment that you can use.
The other option is to use Proxmox and install the same HA OS in a VM. You can then also run another VM, say Ubuntu, to run other software that isn’t available from within HA. Best of both worlds, but requires a little more set up and config. Once up and running it’s easy to maintain and HA updates in the same way it does if you were to run HA OS NUC image directly. Something to consider.