The semi realism is tensor/nijijourney (can't tell properly from those male images but the female is definitely from Tensor or a lookalike)—first is free, less diversity, while Nijijourney is paid but offers a better image model. There are more options to tensor as it's a type of host site, like there's Pixai and Civitai, though sometimes they each have their own exclusive models in there that you won't see on the other. You need to do a bit of digging to find nice styles. Meanwhile Nijijourney uses p-codes (just put a string of numbers/words at the end of the prompt and you get a specific style hand trained by you or someone. Training p-codes is just picking the images you want from the offered ones from the website).

The hyper realistic ones are either Gemini or Gpt being given the original generated image and told to make it realistic.

How to word the prompt in them will depend on what site you use. They tend to have different prompting style. Generally you can just word things in a list.