There is no definitive answer to this question as the answer largely depends on the blog and the comments system in place. However, from a general perspective, it is generally accepted that comments can help improve your SEO because they provide additional information about your blog and its content.
Additionally, by engaging with your readers and providing them with valuable feedback, you can encourage them to visit your blog again in the future.
However, it is worth noting that not all blogs make good use of comments. If you have a relatively inactive blog or do not have a active commenting community, then comments may not have a significant impact on your SEO.
On the other hand, if your blog has a high level of engagement and active commenting community, then comments may play a more significant role in boosting your ranking. Ultimately, it is important to experiment with different comment settings and see what works best for your blog before making any assumptions about how they will impact your SEO.