You could spin one up this evening if you wanted. Or go use catodon.social.
That's not the point. The point is, there are reasons Mastodon is being rejected, just like there are reasons you seemingly cannot pay people to use a Misskey-based or Hubzilla-based website.
It's not where the people are going, and the public or semi-public figures are going to follow the people.
You have misread their comment and understood it backwards. AP's saying people on Mastodon are engaging in Lemmy discussions.
There is no way to follow Mastodon users from Lemmy. Lemmy simply does not work that way.