I've been messing with the config since the preview builds released and doing the connection test on any port I put results in the connection timing out.
https://dump.geysermc.org/n68N1n7LkQov4KhfKuNV8X2RvGqYuiO2
The server doesn't appear to be up for bedrock players and whenever they try to join, nothing in the console suggests anyone's tried to join.
I do also use floodgate but the server isn't reachable on bedrock or by the connection test with or without it.