wireguard manual routing

[Kieeps]

I switched to opnsense mostly to learn networking, and initially I got a tunneln Up and running between my opnsense to a off-site server running opnsense using the wireguard plugin.

But somewhere along the journey of late night configurations and trying out stuff the tunnel and wireguard server for my phone stoped allowing access to the network... I can tell the connection is up but I can't access anything

So my question is, exactly what kind of routing does "allowed networks" do? I figured I'd just disable routing and do stuff manually to be able to understand what is wrong... But what am I disabling? What kind of settings does the wireguard plugin do if I don't disable the automatic routing?