To add some more info to what the others are saying, if your public IP address is in the range 100.64.0.0/10 (so between 100.64.0.0 and 100.127.255.255) then it is a CGNAT IP and you will not be able to make port forwarding/NAT work to/from the public internet because your public IP is not actually a publicly routable IP on the internet no matter what your ISP calls it. Hope that helps!
To add some more info to what the others are saying, if your public IP address is in the range
100.64.0.0/10(so between 100.64.0.0 and 100.127.255.255) then it is a CGNAT IP and you will not be able to make port forwarding/NAT work to/from the public internet because your public IP is not actually a publicly routable IP on the internet no matter what your ISP calls it. Hope that helps!