"recipients"
There isn't a big bag of money that America hands to other Nato members. There also isn't a big house share in which France etc doss about and won't pay their share of the leccy bills.
Yes, America spends much more on defence. A lot of that is not about NATO though - America wants to send aircraft carriers to sit meaningfully in the waters near the middle east while Israel bombs Gaza in a "just you try anything" manner. America wanted to be the ones in charge of world shipping - that's why they were the ones taking on the Houthis. America spent money on wars in Vietnam, South America, Iraq. All of that is American defence spending. And America's choice.
As far as Nato goes. Yes other countries benefit from the "mutual defense pact" that America is a major part of by virtue of its size and military spending. But the only time Article 5 was ever triggered was when America was attacked. And lots of NATO soldiers dies, and lots of NATO countries spent lots of money. So it is not one sided. America also benefits from having bases, nuclear weapons in other countries. Without meaningful security guarantees that puts those countries at more risk, not less (A country bombing America would also bomb American bases in Italy whether Italy had done anything or not).