There isn’t one.
Animation blueprint arent supposed to have any code.
The character needs to process whatever, however, and then that information in the form of whatever (here a vector) is passed onto the ABP.
Anything at all that involves any coding or parsing should never be a part of an animation blueprint.
So, the look at node is an immidiate nono.
Even if all you are doing is copying info from one bone to another - which a copy node will do just the same, and without any processing behind it - you are still in the this is trash territory.
Depending on what goal you are trying to achieve, adding in a leg IK or a CCKD or a Fabrik node with the final direction/relevant info - probably including a rotation - passed into it, will likely work a lot better. And also follow best paractice…