I think it works fine if you have 1 embed, I think if you are trying to embed different types of blog posts in different Discourse categories it will require a bit more tweaking.
I thought I could make it work using the Tags, but tags alone doesn’t seem to do it (for my setup). I believe on Ghost I will need to make Content Collections which basically allow me to add a folder structure (like alphagamer.net/blog/ and the others that I need). I will try this over the weekend, update my “path allowlist” and post here if I am able to get this to work.