[thatloststudent]

From what I see running the test on my phone, there's an option to tunnel DNS through Rethink here, which you can change to the VPN's DNS. Everything else is tunneled by default through wireguard. Maybe there's a configuration issue on your end?

[bubblesnort]

The only place I see where wireguard can be set up is as a proxy for DNS. Perhaps that would still allow changing the default gateway?