Is there a way to add IKs after a pose?

So I have a model in a pose I really like and I want to animate it with IKs. I didn’t add them at first because I wanted to achieve a different animation for my first shot. But now when I add a heel and knee IK, they aren’t aligned with the rotated pose of the legs. I can’t parent them or copy the rotation because then that makes a dependency loop. Any way I could fix this?