Uber income is considered self-employment income, regardless of whether you do Uber rideshare or Uber Eats delivery, as per these TurboTax FAQs:

https://turbotax.intuit.ca/tips/tax-tips-for-uber-drivers-in-canada-17003

https://turbotax.intuit.ca/tips/gst-hst-reporting-requirements-for-food-delivery-services-11950

Even if your not doing Uber, if you have employment income that's more than $3,500, you need to pay CPP contributions on that income. So, you must enter it as self-employment income if you don't have a T4 slip from an employer showing that the contributions have already been made during the year.