Adding private hostname in Cloudflared Tunnel --> Private Network

**Describe the feature you'd like**
Currently, Cloudflare Tunnel supports adding a public hostname and private CIDR. However, we can't add a private hostname.
Engineers are using WARP to connect to internal company resources(ex: private K8S cluster in AWS); at the same time, we don't want to open the entire VPC range, but routing the private IP instead of the private hostname of that K8S cluster proven to be unstable since the private IP will keep rotating.

**Describe alternatives you've considered**
When a private IP rotate, I need to update it manually in the Tunnel. Also, creating a public hostname (protect it with CF Access) and upstream it to a private hostname didn't help because of the pinned certificate mismatch.

**Additional context**