Lightning routing node operators can charge higher fees for that, and incetivize others to run their own nodes.
Unless I missed something you can't charge fees for incoming channels so you also can't charge
higher fees for that use case. You could charge higher fees in general, but I don't think you get to set different fees depending on which channel the balance comes from.
Though I guess it you could write a script that automatically increases your fees for a short while whenever a new channel is opened? Not sure what that would do to your routing reliability though.