If you got speed you can generate power, but flow is something quite different.
The FLOW is all about connecting the dots. Dropping in, to your first cut back and then building speed at the top of the face before you cut back again to back side off the top.
The problem in sup surfing is the paddle and how clunky it can make it all look so being able to transition between moves and slide the paddle round is something you have to work on and be creative with.