Some control rig node are still a mystery to me, but in the meantime as an alternative you can use a rotation matrix to offset the transforms: FootRoll_UE5_2.zip (8.9 MB)
Hope someone with more experience on CR is able to chime in.
Believe me, you don’t want realistic feet at the point you have single toe control.
Its another additional 20 bones that are mostly useless - literally had to do this for a client not too long ago: it was pretty painful.
Whats worse is you can barely notice the toes moving in the final animations… felt like wasted time for the most part.
That said, control rig is getting kinda nifty. Considering baking animations is all that the engine is good for right now thats a good thing