Charger plug doesn’t fit under outdoor weatherproof cover

So I just had an outdoor outlet put in near my new Prime. Problem is, the weatherproof cover won’t close with the charger plugged in—not unless I try to force it, but of course I don’t want to damage the cable by over-bending it.

I looked for a right-angle plug adapter rated at least 15 amps but came up short—unless I get one that has a cord. But even if it’s a very short cord (1 foot) that means where it and the charger connect will be outside, exposed to the weather, and I don’t want to risk infiltration.

Anyone here with a similar issue who’s found a solution?

 

Is there a version for a 1-gang box? This wouldn't fit mine. I didn't see anything bigger at Home Depot or Lowes.