After drawing five and 6 dots designs. I suddenly raced to 11 not before posting some 9 dot patterns. Probably 7 and 9 are the most popular among rangoli with dots. Its only a guess.
So in this post - the rangoli above has a 7 by 7 dot template. Draw the central design and the four patterns extending from it. Draw the floral patterns on the four sides. Complete the rangoli with few colours. I have added a few dots on each flower, to represent the stamens(?) of the flowers. The video from my channel for the rangoli, posted above.