I’m concerned that your router shows one WAN IP address while an external service thinks you have a different public IP. It could be that your ISP is using a Double NAT system, if this is the case then I don’t think it’s possible to access your server externally.
You should read this topic:
You set-up a Hostname, No DNS Type A records needed with this.
It’ll alutomatically populate with your public IP address when you edit the Hostname.