Home Assistant Supervised & Matter

As you may have guessed I am new to the world of Home Assistant.
I started with a raspberry Pi before moving to a Dell Wyse 5070…
I would not say it was a smooth ride but every day is a school-day as they say.
I started with HAOS but very soon was advised that I would be better with Debian, Docker and HA-Supervised. That’s where I am now.
Unfortunately, somewhere along the line I have met a few issues…
Advanced SSH & Web Terminal… started off working and was my go to terminal add-on, now when I open the UI I get a blank screen. Who knows

Next comes Matter. I was gifted a couple of Meross smart plugs. Easy I thought… I now know it is not. In short Is it possible to get Matter working on my setup?
I would really hate to have to scrap all I have done and go back to HAOS…
Alan