You do know that an amendment is something that is added to a bill after it is passed, right.The bill itself was worked on by both Republicans and Democrats.
The Republicans in the Senate alone had 160 amendments introduced to the Bill that passed.
Just because R's decided for political posturing, in unison not vote yea on the bill, does not in any ways diminish the fact that the Republicans introduced and passed well over a hundred amendments to the ACA bill.