This report explains F-35 have no remote control nor kill switch, but depend on US companies for maintenance and parts.

Source : https://interestingengineering.com/military/f35-kill-switch-reports-debunked

Even if an F-35 operator disconnected from the larger Joint Strike Fighter program’s supply chains can keep some number of its jets flying for a period of time through spares on hand and cannibalization, those aircraft would have extremely degraded capabilities.

Source : https://www.twz.com/air/you-dont-need-a-kill-switch-to-hobble-exported-f-35s