I think the post you saw on Lemmy must have gotten removed or deleted. This comment I found seems to be debunking the same post but the link button leads to a blank page. I do wish there was an archive of removed/deleted Fediverse content for reference purposes (with a reasonable level of censorship, such as omitting illegal content and personally identifying information). I think I saw another post on Lemmy of the same misinfo less recently than a day or two ago but I couldn’t find that post.