I haven't logged into a reddit account in years, the lack of karma is not something present in my mind on lemmy, so a post referencing Nvidia and Outlook could suggest that it's karma in the fate sense that big tech is having issues after going full AI.

There's probably a tool somewhere on github to get it yourself, which will inevitably have no documentation 🫡 Paraphrasing issue 2370 on the lemmynet/lemmy github it's intentionally not implemented on the server side to avoid people farming the score leading to low quality content.