No, a chinchilla cannot safely eat yogurt drops.
Yogurt drops are made out of milk and chinchillas cannot safely eat dairy.
It is best to avoid feeding any sort of dairy to a chinchilla as it is bad for their health.
Any foods that contain animal ingredients are unhealthy for a chinchilla including: milk, cheese, ice cream, yogurt, etc. Chinchillas are strictly vegetarian.
If you were to give them a food that contains animal ingredients it could be fatal or cause digestive system issues.