[wut42]

CGNAT does not means unroutable IP, it just means you would only have assigned a small range of ports on a routable IP with others.

[BenjiWiebe]

If you have CGNAT, the IP on your router's external interface is unroutable.

Just like how when you do NAT for your home network, your devices get assigned non-routable private use only address space.

Unroutable meaning not publicly routable. Of course you can route traffic through your own LAN to your Internet gateway.