Alright, looks like you’ve got all the usual suspects in check—public IP, port forwarding, and firewall. Let’s zero in on AMP’s logs to see what it’s whispering about connection attempts.
Go to the Minecraft instance’s “Logs” section in AMP (right-click → View Logs). Scroll through and see if there are any hints when others try to join—like connection attempts, errors, or anything juicy like that. Post the relevant bits here as text (not screenshots), and we’ll piece together the mystery! 
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