@benoitgrelard @brian_d_vaughn I can certainly try 😎
If I understand your scenario correctly, I think the branch subdomains should get you there.
https://www.netlify.com/docs/custom-domains/#branch-subdomains
My tweets and posts live here on my own domain these days.
You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.