I made the VTC, but our rich presence does not appear
First, check that you've correctly configured TruckersHub's discord RPC integration (https://docs.truckershub.in/#discord-rpc). If so, give the tracker some time to refresh; it can take a while.
Discord might show another Rich presence like “Playing TruckersMP”. You need to turn its Discord Rich Presence off to be able to see TruckersHub RPC seamlessly.