Question about bypass mode

[N4KHQ]

Can anyone explain what is going on with StarLink bypass mode. It is not traditional bridging. I have a Linksys EA9500 router. I reset to factory defaults, setup two SSIDs, StarLink_2.4GHz and StarLink_5GHz with passwords. The default router address was 192.168.1.1. I put the StarLink Router in bypass mode and plugged the EA9500 router into the $25 Ethernet Adapter. It's working great but how did the EA9500 get an IP address of 10.193.191.121. and DHCP get set to a start IP address of 10.193.191.100? The 10.193 part of the IP Start is fixed but I can change the 191.100. Maximum number of users is 49 but I can change it to 1 to 155. Subnet mask is 255.255.255.0. The EA9500 seems to be functioning as it should but I don’ see the port forwarding option. I know port forwarding is not available because of CGNAT but how does my 3 year old router know the hide it? How did DHCP get set on my EA9500 router? If I enter 192.168.1.1 in a web browser I am get Starlink.com page. The StarLink App works as it did before I put it in bypass mode. Thanks in advance

[N4KHQ]

A little more information of what I think  is happen ing. When you turn on bypass mode, you are assigned an IPv6 address that is not being NAT'd. Starlink router is assigned a cgNAT IPv4 address. Because of CGNAT you will always be double NATting but IP6 keeps you from triple NATting. 

[N4KHQ]

Well guys this is a little embarrassing everything I have posted is true except one thing. The StarLink router is not in bypass mode.  I must not have saved the setting when I changed it. The Starlink router wifi is giving out 192.168.1.x ip numbers and my router is giving 10.193.192.x numbers