Try a little detective work........
You've had the lens off to replace the bulb, can you remove anymore of the fixture to see if the wires are intact?
It's not difficult to remove the actual plastic switch......I assume it's the kind that's on the underside of the cupboards. Check that the wires are attached at the switch. They may be direct to the light fixture itself. You're only dealing with 12 volts here. Maybe to test and see if the switch is defective, make direct contact of the wires with each other instead of using the switch, and see if that lights the light
Ken and Terry
2018 Sunseeker 2430S with Trekker cap
and only rarely pushed by our 2017 GMC Terrain toad (4 wheels down)
Former Georgetown 330TS owner for 10 years with more mods than I can count.