Does not look pretty, but gives you an idea of where Meraki has 3389 open to the outside world and what IPs are allow. If somone have a better looking metric, I would like to see it.

Networks[?State == 'Active'][].PortForwardingRules[].rules[?publicPort == '3389'].join( , [join(, [, to_string(name),,to_string(allowedIps)])])