This popular report shows the monthly, weekly, and daily traffic to your site where that traffic has a session source of a known answer engine site as evaluated by a regex in the query matching popular ones. So, for instance in the screenshot below for the community makemeaprogrammer.com site, you can see traffic coming from ChatGPT, Perplexity, and You.com.
You can filter this report by:
Date range
Source(s) you're interested in
The dots in the weekly view are a curious artifact of Looker not fully understanding the concept of "week" for small data sets that we'll work out eventually.