Create a permanent staging environment

I have a blueprint setup and I would like a permanent staging environment, I’ve read a few threads and in 2022 there are answers that it should be coming soon but I still don’t see anything (unless I’m missing something) to do this easily, either with a single or multiple render.yml files (ala “Multiple environments in a single render.yaml file” feature request)

Is the best option I have the one in the thread 7280? - sorry I can’t link yet