I also put a ticket into I3 Broadband my ISP. I have port forwarding turned on with my Eero 7’s, but the Diag says port exposure not working.
Is this a recent issue? I mean, everything was working before with the same settings, right? What does curl -4 ifconfig.me return ? Your real public IPv4 (the same one returned by dig in my message )?
Could your ISP have started using CGNAT recently?
This just started a few days ago. But hey! I found the problem. The firewall (ufw) did not have those ports opened. I never closed them, this is a mystery. But it is working thanks.