If you go to lemmyverse.net and click TAGS next to a funnel icon, you can then select to /hide/ Cloudflare tags (in which case it’s not hiding the tags but actually hiding nodes that have the CF tag). That is one way to find a Cloudflare-free Lemmy instance.

I personally fetched the dataset, imported it into a DB, then I had the freedom to specify all the criteria I want in my searches.