If memory serves, the entire 10.0.0.0 ip range is a private network. This means that your internal network is nat from another nat network. My guess it’s a ISP that has cgNAT or that you have for some reason 2 routers which both does a Network Address Translation.
Either way, you need to do port forwardings in your 2 routers or contact your ISP for the possibility of getting a public IP address.
Thank you for your patience while we’ve diligently worked to reach every request for support with port forwarding. The diagnostics you’ve provided suggest there is a redundant layer of network address translation preventing port forwarding.
This can either be at the local-network level (commonly as a result of two routers), or at the level of your service provider (in the form of carrier-grade NAT).
Since you have an Xfinity gateway, you should be able to perform one of the following in their app or web administration page:
Enable Bridge Mode or equivalent, where the ISP-provided gateway does not have DHCP routing enabled.
Alternatively, if you have already created a manual port forwarding rule in your 3rd party router, you can add an additional rule to forward the port through the ISP/second router. This was @Thomas_Stedtenfeldt’s suggestion above.