Nintendo doesn't allow connecting to private servers, so to bypass that you need to partake in some DNS wizardy. Modify your connection settings and change the primary DNS to my IP address: 188.8.131.52
After doing that, power off your Switch. Boot up and reload Minecraft. After it's done connecting, one of the built-in servers should this one.
Please note that I haven't made a method to delete or edit comments yet.