According to what I’ve found on the internet, mastodon servers should be indexable unless otherwise set by the admin.
Besides that, every user also has the option of the opt-out of search engine indexing.
In my experience, Google and Bing have indexed Mastodon server info as well as toots, but these don’t show up high in search results if they even do (for non Mastodon related searches).
Mojeek doesn’t seem to have crawled any Mastodon server. I can’t find Mastodon servers or toots using Mojeek.
Is this done consciously/by design?