I have a long list of features in the rows, and I want to group them together. Is it possible in a side-by-side question create Header Titles for separate item groups?

There isn't a built in way to do this with a side-by-side question like there is with multiple choice or matrix questions.

Side-by-Side Questions: Is it possible to put different headers for multiple row items?

Side-by-Side Questions: Is it possible to put different headers for multiple row items? | Experience Community