You cannot do Uber X and Uber eats at the same time under the same account. This feature was available before 2020, not sure exact year but Uber no longer support this. I understand this is to support Uber eats partners. I personally know people using multiple account to do this but this is violation of their T&C. (Doing Uber easts from one account and Uber taxi from another account). You can signup for other food delivery services such as deliver easy and Menulog and can do both the same time. However, I won’t recommend this because getting food inside an Uber X car will make the car smelly and riders won’t prefer it.