How can I use Playit if the IP address that it uses to advertise my connection is wrong?

The IP that appears in Playit is the IP that appears when I search for my IP in the browser, but actually my friends when using that IP do not connect, but in the router settings where it says what the wan IP is. a completely different one, and from that my friends can connect to my server

“that is uses to advertise my connection is wrong?”

I don’t know what that means. What would be correct? Could you provide examples and highlight what you expect and what you are actually seeing?