M6 and IP-passthrough with routable static IP

So I have an adjacent issue regarding ip passthru.   I just purchased the new Nighthawk 5g M7 - MH7150.   My main objective is to use it as a backup WAN connection to my UI UDM-SE when my primary connection is not available.  I'll also use it on trips when I'm away from home    I had to purchase the docking cradle to get it to work as WAN backup.   MY UI Ethernet POE to USB-C adapter did not work.  I am only using the cradle to connect to my wan2 port.   I have it working with the cradle but  the M7 is providing a private 192.168.10.x address to the UDM-SE which I'm assuming is a double-NAT situation and not preferred.   I cannot find any setting on the M7 for ip-passthru or bridge mode.   I've looked using the mobile app and direct web interface to no avail.   I know it is a fairly new device but wondering if anyone has any insight.   I opened a ticket with NetGear as well.  BTW,   I'm using an eSIM from a 3rd-party provider and it is working very nicely as a standard mobile router.    I didn't use the NetGear eSIM marketplace.    I don't love the mobile app but it is usable.