You can combine them on the same Schedule C as long as you are the sole proprietor of both sources of income. If you prefer to separate out the income/expenses for each, you may also do it that way.
Use the business code of the primary source of income for the Schedule C (if combining). The following link
has a long list of codes starting on page C-16 of these Instructions for Schedule C.
485300 Taxi & limousine service (for Uber/Lyft)
492000 Couriers & messengers (for delivery)
