My copied answer to other user in this thread:

I’m in US. My ISP Xfinity provides their own router and has decided their users are too stupid to use router settings so they purged port forwarding settings from the router firmware altogether. Now you have to use their mobile application which doesn’t allow you to make port forwarding rules for a specific IP (because again, they think their user is an idiot that can’t figure out IP numbers), instead it just gives you a list of devices and you have to select one to create a port forwarding rule. Wired devices are not on that list.