First, thank you for your response.
Second, I have a follow up questions.
Let's say I am account on Twitter that is looking to transition to Mastodon. I do not set up my own instance. Some of my followers look at what instance I am on and pick the same one. They end up with about 200 followers each.
If I post something with a hashtag, are those hashtags only found in searches by people using the same instance used by my followers and me, or does it expand to the instances of my followers' followers?
Does the answer change if my followers boosted the specific post with the hashtags and it was seen by their followers on different instances?