I was able to set this up for two of my Cloudflare domains (free plan), but it was a little tough because the dashboard only remembers the last configured domain.
Anyone with more than 2 or 3 domains will understand what I’m talking about if they try to configure/manage settings for this feature.
While we already have a number of column headings in the dashboard, maybe adding one for Web Analytics is a solution to get to the Web Analytics settings for the currently selected domain.
If more info is needed, let me know. I can probably add a screencast or something.