Struggling to get communication from windows to PX4 on Ubuntu working properly

[Edmonds1997]

Hello I have a windows PC running an Unreal Project with IP address: 192.168.2.100. I have another Ubuntu PC running PX4 SITL (via the "sudo make px4_sitl_default none_iris" command) with IP address: 192.168.2.200. The two computers can ping each other but when I try to run the simulation I get the following in Unreal Engine:

"Disconnecting mavlink vehicle"
"Waiting for mavlink vehicle..."
"Wating for TCP connection on port 4560, local IP 192.168.2.100"

PX4 shows this:

I tried editing ~/.bashrc to have the following lines at the bottom
export PX4_SIM_HOST_ADDR=192.168.2.100
export PX4_SIM_HOSTNAME=192.168.2.100

I do find it quite weird PX4 still shows [init] PX4_SIM_HOSTNAME: localhost and not 192.168.2.100...

If anybody could point out what I'm doing wrong I would greatly appreciate it. I haven't been able to find many examples not using WSL2.
I've heard this can also be firewall related, but I tried with it off and got the same results. I used Wireshark on on the windows PC and saw some TCP packets.

My settings.json file looks like this:

{
"SettingsVersion": 1.2,
"SimMode": "Multirotor",
"ClockType": "SteppableClock",
"Vehicles": {
"PX4": {
"VehicleType": "PX4Multirotor",
"UseSerial": false,
"Lockstep": true,
"UseTcp": true,
"QgcHostIp": "",
"TcpPort": 4560,
"ControlIp": "192.168.2.200",
"ControlPortLocal": 14540,
"ControlPortRemote": 14580,
"LocalHostIp": "192.168.2.100",
"Sensors": {
"barometer": {
"SensorType": 1,
"Enabled": true,
"PressureFactorSigma": 0.0001825
}
}
}
}
}