Note that flags have official ratios - they're aren't just a generic shape.
Last I checked, there's some ambiguity in how to draw the moon in the upper triangle. It's supposed to have eight points with no prescription on how they connect to the crescent below. (Step 18 in this tutorial: https://www.settinger.net/experiments/nepal-flag/). This seems to be the most popular version: https://clipground.com/images/nepali-flag-png-4.png.