The Tanks sent to Ukraine were downgraded with a less capable armor. Would the US armor have stopped the tank round? Maybe.
The T72 has a 125mm gun. With appropriate round, I have no doubt that it could penetrate an M1 from the sides or rear. Especially an M1 that had all it’s best goodies stripped out. I have somewhat more doubt that it could penetrate the frontal armor, even without the ERA and other goodies.
Always depends on type of munition and where it hits, there is a video of a Bradly taking two hits and armor worked.
With that said Russian tank armor and design seems pretty susceptible and I find it curious when people crow about an abrams or a Bradly is taken out or a dozen vehicles are lost in an early Ukrainian offensive( a daily occurrence for the Russians), yet daily loses of t-90s are happening, and most likely prewar numbers of these tanks are gone and nary a word, plus where is T-14s
I would imagine that if the Russians are ever able to export weapons again they might find few takers