with 2 satoshis it's never going to send. it will return to your wallet when it drops from the blockchain. alternatively you still up the fee. technique will differ by wallet so better ask moonpay.

On your order screen does it say received and also check on mempool.space input the transaction number and it should say how long you have to wait for confirmation.

Sounds like it's been funded at a rate under 10 sat/vB as anything above that clears in the early hours of the morning if fees spike in the day. Unfortunately that may never be confirmed, which is bizarre if you paid high priority fees.

If you sent with too low of fees it will either;

A) Eventually confirm.

B) Around two weeks after sending be forgotten by nodes and appear back in your wallet.

It's never 'stuck' forever.

I genuinely don't know mate. I think it ends up in a loop of failing and resending, but I'm not sure what control you have over that. Is it possible to boost the fees on the payment through your wallet?

The best way I've found to ensure you're not paying huge fees (or not enough) is to check the current fees on Mempool.Space and then set the wallet fees manually. Obviously this doesn't help you currently.

No problem whatsoever. I'm kinda getting my head around all this after a year, but the breakdowns of boosts where about $2 goes to the increase in sats and the rest goes to exorbitant miners' charges blows my mind. I'm assuming you're only paying that for enormous transactions when someone meets you with a suitcase of money and you both don't want to stick around...