Are they showing up on the kasa app when you operate on local site? If not, you need to add them to the app. If you can operate them locally but not remotely, check whether remote control is enabled....

The router has public WAN IP address? The server you want to open port for has correct IP address, gateway and DNS? Make certain the server is accessible from internal network. Did you try different...

Make sure remote control is enabled for the camera. Sign in the camera app with tplink cloud account. See if you can see the camera on the tplinkcloud.com website.

Hmm.....I think even TP-LINK customer support doesn't know that. And any unauthorized disassembly will void the product's warranty.

Hi, Did you try change the DNS on the router to like 8.8.8.8? What's the current firmware version of your router?

Yes, it's normal, the browser will hide http:// automatically if the website is a http website. When there is a website without http://, you can copy the address in the address bar, and paste it...