Is it possible to delete the default route or increase its cost? My dash cam acts as a wireless access point and DHCP server, to which I connect the phone for configuring options and interacting with recordings on the cam. The problem is that the camera doesn't offer an internet connection, so on the phone I can either choose not to use the cam's wifi (and thus not connect to it) or I can use it and not have any internet, since the wifi network apparently is a lower-cost gateway than the mobile network, despite having not internet.
If I could increase the cost of the camera's gateway, or delete it altogether then I suppose I could stay connected to it and still have a working mobile connection. This is easy enough on a personal computer, but I don't know how to do it on GrapheneOS. Is it a possibility?