Carryout: A couple bucks is fine if the order isn't huge.

Pizza Delivery: If the place has its own delivery driver, 5 bucks is about right. More if it's an especially large order.

Sitting and Eating: Having tons of friends that work in the service industry, if you tip less than 20%, you will be known as a cheapskate. 20% is the new 15%. 15% has been a bad tip for well over 10 years now.

Also, I personally tip 20% for both carryout and pizza delivery. You won't be thought of as cheap if you don't do that, but I've always tipped well and have upped that even more because of people being forced to work during a pandemic.