@taoish@CoinOfNote I'm sorry, I thoroughly misread your message ❤️
On mastodon.social, I rarely get zero results but when I was on smaller instances it was a much bigger issue. I'm co-hosting the MythologyMonday hashtag on thefolklore.cafe and when we first started out, there were quite a few posts that didn't show up (but did show up when I searched from my personal account on mastodon.social).
Mastodon instances only get search results of instances they know, so a 3rd party crawler would be 👍