You only follow 13 people, that might have something to do with it 🤙
Discussion
That's not why. When you use hashtag that a lot of people follow, the note should reach a lot of people.
Nostr's daily user numbers remain pretty much flat at 17k daily users according to nostr.band stats. You have very few follows, followers and posts. Nostr rewards engagement, and you haven't engaged much, not even 200 notes total. I only noticed this now because you interacted with one of my posts, so I checked out your profile. That adds up over time.
Secondly, why would people choose to respond to this note? What is interesting about it? Just because there are no responses doesn't mean it wasn't seen, just that it wasn't interacted with.