Note that what amounts to a single page app with all the links rendered after fetching some data from a service isn't going to be something that can be indexed by a search engine.
A google search for site:lemmy.ml with it rendered this way will never result in any data.
Part of the value that people have ascribed to Reddit is being able to do searches for a product review and limit it to just pages served by reddit. Lemmy appears to be ephemeral and not searchable.
Choosing a random Lemmy instance, I see server rendered content and <a href> links that are followable. Searching for 'site:<instance domain>' on Google turns up plenty of results, very much identical to what I see when searching for 'site:reddit.com'. Google seems to have no trouble indexing the site.
I expect you won't see results on Google, save for when you explicitly ask for the site, because there isn't much in the way of reputation. You are highly unlikely to see my personal blog, which is just plain old boring as it gets HTML, come up in search results for the same reason.
A google search for site:lemmy.ml with it rendered this way will never result in any data.
This may or may not be a good thing since it isn't necessarily assured that the data is stored for extended periods of time (compare: https://masto.host/mastodon-content-retention-settings/ ).
Part of the value that people have ascribed to Reddit is being able to do searches for a product review and limit it to just pages served by reddit. Lemmy appears to be ephemeral and not searchable.
Discussing the current Star Trek SNW episode may be ok, but reading a discussion from a few years ago about Emissary on DS9 ( https://www.google.com/search?q=deep+space+nine+emissary+sit... ) is something that isn't going to be doable.