It's limited to the fact then you can't get to your LAN from outside without forwarding the port that the camera needs, so they maintain a server that gets around that. (It's like TeamViewer - different port, but the same problem.) If you can find out from them which port to open, and what app (maybe your web browser) to use to get to the camera setup, people here, or you can go to
https://portforward.com/router.htm, find your router, and follow the instructions for forwarding the port WyzeCams gave you. (You can choose any port on portforward, just substitute the number of the port - you type that number in when you're adding it to your router, so "change it in your mind", then type the correct one in.)
If Wyze won't give you the information, there's not much you can do, unless you can use something like Wireshark to figure out which port(s) the camera(s) is/are using. (And even most developers don't like getting involved in something like that. It's an "okay if it's absolutely necessary, but otherwise no" sort of thing. Difficult at best, if you have some box all the cameras connect to, maddening if each camera is on the AN but using a different port. [There are 65,536 ports, about 64,512 of which are possibles.)