I'd be happy to.
As we've discussed, the major social media platforms today have recommendation algorithms and other design choices, such as the way their buttons and apps look, feel and interact, that are designed to maximize engagement, but you could maximize something else. You could maximize, for example, the civility of discourse so that, if there were a long series of posts going back and forth on a controversial issue, you could actually bring to the top the one that seems the most clear and helpful and is achieving some amount of support or balance from both sides.
Other people have explored using algorithms to deter or dissuade people from posting toxic content by trying to nudge them in a more positive direction.
There are many options here. In essence, we just have to maximize for something other than engagement or for a combination of engagement with something else.
Why hasn't this been done? It's because engagement is how you attract eyeballs, and eyeballs are how you attract advertisers or subscribers and, thereby, make money.
There are academics who are experimenting with what are sometimes called civically oriented platforms. It's a worthwhile effort, but it's unlikely that these would ever be commercially viable alternatives because people actually want the high-engagement platforms.