I went back half a year in her account, and it seems like it was entirely re-Tweets and self-promotion? It would make sense if the algorithm isn't prioritizing that kind of content, or that kind of content isn't gaining traction.

I saw she re-Tweeted something from Bryan Johnson. Looking at his account, he has less than half as many followers, but many more likes and a lot more engagement. But it's almost all his own content, and it's content that readers would actually find engaging.