They did not revoke "the subsidies." The ACA subsidies are still in place. What was allowed to expire was the temporarily increased COVID subsidy levels, which were sold as a temporary emergency expansion. If they had originally passed a genuine and permanent ACA expansion, rather than an expiring one, there's likely nothing that could have been done to "revoke" it by those currently in power.

Maybe you mean this, but it's important to be clear about the distinctions we don't mislead people, and then someone tells them the whole truth, and then they wonder what else we were wrong about.