Geyser configuration

Restart your server and Geyser should generate its config.yml file in the plugins/Geyser-Spigot folder.

Search for the port field and set that to whichever port number you allocated and noted down earlier.

Importantly, if you are using Floodgate, you must set these config options in that file:

address: auto
auth-type: floodgate

You can also set the MOTD and server name to change how your server appears in the bedrock server listings.