Port Forwarding using External Router

With both the Starlink router and my Zyxel router enabled, will I be able to use port forearding on the Zyxel from "outside"

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I have the rectangular Starlink dish, it seems OK so far.

I have a need for port forwarding to access my computers from "outside" so I got the external ethernet adapter (that goes in series with the antenna cable) and attached my own WiFi router.

Here are my router settings:

Starlink:

WiFi Chan 6

DHCP 192.168.1.nn

Zyxel:

Wifi Chan 2

DHCP 192.168.2.nn

So far, I did not put the Starlink router in Bypass (or is it Bridge) mode.

I can connect my laptop to either router and everything seems to work OK.

I setup port forwarding in the Zyxel but have been unable to connect fo far.

When I do a "what is my IP" I get the same IP address for both the Starlink router, and the Zyxel. I guess this makes sense.

Could the Starlink router be preventing my Zyxel router from seeing the incomming ports I need to forward?

Thanks, Mark.