It means that no packet from internet (to this port) reached your router.
That public address, is it directly on your router or somewhere else, e.g. some modem from which you're forwarding ports to router? If the latter, is that configured correctly?
Is "1wan" really your WAN interface? Can't there be a mixup between between e.g. ethernet and PPPoE? What if you replace in-interface=1wan with in-interface-list=WAN, does that help?
You can also check if any new connections come from internet with:
/ip firewall nat
add chain=dstnat in-interface=1wan action=dst-nat
Then try any online port scanner with any port and see if it logs anything.