I made this website to crawl and display Lemmy instances since the existing ones were lacking certain filtering and search options.
I have licensed it as MIT and the code is on https://github.com/tgxn/lemmy-explorer
Let me know if there’s any issues, and create a GitHub issue if you want some features :D
You can also run the crawler yourself with a local Redis instance, and then analyze the data however you want. :)