@ron4ex @Netlify @vercel Sure thing.
There are a few ways you could do this on @Netlify depending on your needs. Simplest might be to add the pages your want to exist on a subdomain into a branch, and enable branch subdomains.
Docs 👉 https://docs.netlify.com/domains-https/custom-domains/multiple-domains/?utm_source=twitter&utm_medium=support-pnh&utm_campaign=devex#branch-subdomains