Issue with the BBA

[gunkey]

I've been having issues with the BBA (Linux Mint 21.1 x86_64 Flatpak). I am using the HLE method and trying to play Mario Kart: Double Dash, and my computer is connected to Wi-Fi. When I get into the game and select "LAN Mode" it successfully creates a "LAN link" (that's what the game says), but it can't detect other users on the network. Even when I run multiple instances of Dolphin on my computer, they won't detect eachother. Do I need to use ethernet, is it an issue with Flatpak permissions, or is it something else?