I haven't seen any obvious bots in the wild here (yet), but they'll come soon enough. There are at least a couple Github repos out there (i.e. this one) with bot libraries so I'd expect some of the old reddit bots could make some sort of a comeback pretty soon.
GitHub - SleeplessOne1917/lemmy-bot: A bot library for Lemmy, the fediverse link aggregator.
A bot library for Lemmy, the fediverse link aggregator. - SleeplessOne1917/lemmy-bot
100% agree, I'm actually working on a pretty basic Stable Diffusion bot to plug into one of the AI art communities, only to respond when someone calls it in a comment. I'd also like to see some wiki bots and such, as well as general moderation tools
Semi related but I got a bunch of communities on the .ml instance, is it worth it to try and get em going in .world as well or is it fine as is for now? .ml's still currently down when I write this so I want to make sure I have the best practices down.