honestly a solid definition of Interactive Fiction is kinda tricky, in my opinion. even just going into the IF tag on itch.io you see a huge variation of what people consider to be IF. parsers are the "classic" form of IF but VNs and choose-your-own-adventures are the most popular now, and there are lots more that don't neatly fit in any category.
i'm pretty fast and loose with restrictions here, as long as your game is recognizably interactive fiction - has a narrative focus with text and includes some kind of interaction for the player, whether that be direct choices, clicking links, or just the ability for the player to choose how to move around and interact with the story (like in bitsy), we'll accept it! i'll add this to the overview as well.