earpods not working for a new iPhone 7s,what do I do

Do they work on another iOS device?

Are they fully seated in the lightning port?

Inspect the lightning port, do you see any lint or debris?

if they still don’t work, go to an Apple store.

Your accessories that came with the iPhone are covered by AppleCare.

Hello,

See this:

Use your AirPods

Reset your AirPods

Good luck.