It’s not clear what you want. And I think you don’t need an extension for that, it’s just a calculation.
I can give you the distance in pixels between two points with this:
Source Distance between points - Math Open Reference
The list of pixels in between two points can be obtained by using 2 FOR loops, one for the x and another for the y increments until the point is reached. Is not going to be fast if the distance is long, so if it’s made in an extension, it would be better, but is not impossible to make with blocks.