Don't you think that it is a good idea to add a reply button to comments to questions and answers? Most people forget to type @username when replying which makes the person who made the previous comment miss the reply and miss the chance to help that person.
This is the story of a time long ago, a time of myth and legend, when Jeff Atwood ruled Stack Exchange. He status-declined Add "Reply" link to comment that pre-populates comment box with @username.
But! Since it was declined so long ago, and the company has changed considerably since then, it might worth asking for an escalation (see Community and Moderator guidelines for escalating issues via new response process (March-April 2020)).