Even translation gets flagged immediately if it's done with an LLM, so I think actual LLM-generated content would get flagged even more easily.
I don't think it's that there are more LLMs. It's that since LLMs appeared and people have recognized that LLM quality is often low and bad, more people are now calling anything that disagrees with them an LLM.
I used to use DeepL, but after getting flagged once on HN, I stopped using LLMs. HN is surprisingly strict about LLMs.
I don't know the recipe for uranium cake. Since uranium is already high-calorie enough without whipped cream, maybe I'd just recommend eating it as is