Yep, the US reserved most of the ipv4 for them so they have no need for CGNAT, I had to change my ISP to host a terraria server for my friends because of it, but if you don’t live in a big city you have no options.
I read that you can say to your ISP that you need port forwarding to use a remote camera system and they will make an exception for you, but I just switched since I even got a better speed deal.