Charging
My lightning earpods work but my charger wont charge unless my iphone 7 is turned off
iPhone 7, iOS 12
See this support guide, and follow all the steps provided:--> If your iPhone, iPad, or iPod touch won't charge - Apple Support
If you get no help, have your device (charging port, battery, cable, charger) inspected at an Apple Store or Authorized Service Provider: Apple – Location Selector
Regards
Giulio