💡How do we setup with the same domain name, a second tunnel with cloudflared for another HA instance running at another location

**Describe the feature you'd like**
Given a working cloudflared HA setup at location 1, using domain and subdomain "loc1", how to run a second / third / fourth / Home Assistant instance on a server located at another location, changing only subdomain.

The idea would be:
aa.mydomain.com:8123 signs in HA at location aa
bb.mydomain.com:8123 signs in HA at location bb

**Describe alternatives you've considered**
Having attempted to install and configure add-on cloudflare and setup bb.domain.com, I received a fatal error

**Additional context**
Add any other context or screenshots about the feature request here.