In this answer, it states that the deceleration of air in the region of pressure rise over a wing acts in a direction perpendicular to the lines of relative chord, explaining how spanwise flow is formed.
To be precise: The acceleration and deceleration acts in a direction perpendicular to lines of the local relative chord.
My main question is does the air decelerate in the vertical axis too? Imagine taking the spanwise flow and flipping it 90 degrees so it was pointing up. In other words, I'm asking if there is a flow component facing upward in the region of pressure rise. (because the acceleration and deceleration of air acts in a direction perpendicular to the lines of relative chord, and the vertical axis would be perpendicular) Below is an image to convey what I mean about vertical flow component. (Feel free to ask for clarification in the comments, it's probably hard to understand what I'm asking.)
Here is an edit that I just did, because I now have another question : Does the air decelerating vertically contribute to stalls? (the air decelerating vertically towards the trailing edge)