URL rewrite params

Hi Team,

I have a scenario where a multi-tenanted SPA app is deployed on amplify with wildcard subdomains with help of cloudfront. We generate dynamic site maps on the backend for each tenant separately for each subdomain.

I would like to achieve the following using rewrite.

app1.example.com/sitemap.xml - api.backend.com/app1.example.com/sitemap.xml
app1.example.com/robots.txt- api.backend.com/app1.example.com/robots.txt

app2.example.com/sitemap.xml - api.backend.com/app2.example.com/sitemap.xml.
app2.example.com/robots.txt- api.backend.com/app2.example.com/robots.txt

Is the host name of the request available in the rewrite rules for me to use the reverse proxy rewrite?

Start with Amplify Hosting rewrite rules and the reverse-proxy behavior described in the issue. Determine whether the incoming hostname is available to rewrite configuration, and document whether tenant-specific sitemap.xml and robots.txt mappings can be achieved for wildcard subdomains.

Written by the indexing model from the issue text.