If the being is all-powerful, it's not restricted by physics. We are.
Or you can say that the all-powerful being exists outside spacetime, and FTL is impossible to anything within spacetime.
So the all-powerful being sees all of spacetime laid out in front of it, like a canvas. The painter dabs paint on the left margin and they streak out toward the right in interesting patterns. The painter dabs paint here and there, the patterns respond, and he continues until he likes the picture.
Asimov had a concept like this in The End of Eternity.
Or you can say that the all-powerful being exists outside spacetime, and FTL is impossible to anything within spacetime.
So the all-powerful being sees all of spacetime laid out in front of it, like a canvas. The painter dabs paint on the left margin and they streak out toward the right in interesting patterns. The painter dabs paint here and there, the patterns respond, and he continues until he likes the picture.
Asimov had a concept like this in The End of Eternity.