Oh man, I could totally use this right now. My inbox is glowing from all the mastodon users finding a post on asklemmy. A lot of the replies are just boosts or “This!!” and I think that any actual conversation is long over.

That entirely depends on the client. Some doesn’t even have notifications. So I would look for a different client, a good list available here.

On lemmy-ui (official client) other than ignoring them, there isn’t. Lemmy is built around engagement instead of voting, so it’s kind of integral feature.