There is no indication of USA "support" of this attack. In fact, to the contrary, Trump has indicated we provided no military support (intelligence or otherwise).
This is not reprisal for Iranian behavior in negotiations. Trump is pointing out that Iran had an opportunity to strike a deal involving the USA as a mediator that could have prevented Israel's attack, but failed to make that deal.
We have sold them billions in military equipment, yes, that's the only thing you've written that is true. I am not yet aware if American-made equipment was primarily used in the attack, or just partly, but I wouldn't be surprised if either was true.