How to assign repeating element of a variable with values from an array in the action chain

Summary

How to assign repeating element of a variable with values from an array in the action chain

Content

I have a variable based on REST endpoint that has repeating element in it that needs to be assigned from the rows of an ADP variable. How do I do that in action chain. I don't see for available in assign. if I use for each in the action chain how do I iterate the target variable to assign to next row in the loop.