Netlify (Why Netlify isn't supported)

Caution

👎 Netlify does not support adding different subdomains under the same apex domain across multiple accounts.
We apologize for any inconvenience caused by Netlify and Netlify Support.

https://answers.netlify.com/t/how-to-add-different-subdomains-under-the-same-apex-domain-in-different-sites-in-different-accounts/125088