Can aluminum cup that fell on the ground that has mold be use after washing ?

I see no reason not to use it after proper cleaning.

There is no risk in using the cup after cleaning with soap and water. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV, Flu and Covid vaccines. Wish you good health!