I doubt the US provides ATGM to Ukraine. 1) Trump doesn't want to antagonize Russia 2) US does not want Russia perfecting defenses when Ukraine uses them or more likely sells them. The best they could hope for is money to make their own, which are pretty good but not great, or an emptying of Warsaw Pact stocks from Eastern Europe with the help of a little grea$e.
Few men are killed by bayonets, but many are scared by them. Having the bayonet fixed makes our men want to close. Only the threat to close will defeat a determined enemy.