2020-P Virgin Islands Doubling D

Good eye. Unfortunately, that looks like damage. If you could see the same thing on other devices, I'd say it was Mechanical Doubling (common and not worth a premium), but since it's only on one letter, the coin probably just got dinged.
If you read up on errors and the minting process, you'll develop an eye for this kind of thing and be able to ask yourself whether it's possible for something like this to happen at the mint.

I should clarify. In the numismatic lingo, a device is a feature of the coin's design, like a letter or image. If the coin or die was doubled during the minting process, you'd see the doubling on other letters, date digits, and the like. We could assess it better with clearer pictures of the whole coin or other parts where you see doubling, but from what I see, the most likely explanation is that it occurred after the coin was struck.