Cloudflare does not store any information, but they are pretty frank about passing it on to APNIC for "research" as part of the deal where APNIC lend the 1.0.0.1 and 1.1.1.1 address to them. This is pretty well established and actually openly communicated by both entities, so should be easy to DDG. You are of course free to believe that this data is totally anonymized and not used for profiling / targeting at all, but imo that is pretty naive.