Why didn't the Mongolian Empire expand to India?

Mongolia, led by Genghis Khan, invaded the north bank of the Indus River in 1221. However, due to the tropical monsoon weather in India, and most Mongolian soldiers were not heat-resistant and their morale was floating, Genghis Khan returned to Afghanistan at the suggestion of Yeluchucai. During the Timur Empire, it did not go south to India, even though it was preparing to conquer the Ming Empire to the west, it was not until the establishment of the Mughal Empire in 1526 that India was completely occupied, not because of its strength, but because of its weather. The founders of Timur and Mughal Empire were both Turkic Mongolian nobles.