I don't think there are common or mainstream places to find 'ff spanking stories' as the term is rather unclear. If it's related to a particular fandom, perhaps checking dedicated fan forums or groups might be a start, but again, it's not a typical search term.
You can find ff14 fanfiction on websites like Archive of Our Own (AO3). It has a large collection of fan - created works. Fanfiction.net is also a popular option.
Online gaming communities can also be a great source. Fans often discuss and share their favorite FF stories, interpretations, and sometimes even fan - made content that can enhance your understanding and enjoyment of the stories. Websites like Reddit have dedicated Final Fantasy sub - forums where you can find a wealth of information.
You should be very careful when looking for it as a lot of 'lemon' content might be inappropriate. However, some general fanfiction websites like Archive of Our Own (AO3) might have some, but they have strict rules about tagging adult content. You need to be 18+ and abide by their terms to access such works if they exist there.
Archive of Our Own (AO3) is another great place. It has a wide range of fan - created content, and the 'ff7' section has some really interesting takes on Cloud and Tifa's story. The tagging system makes it easy to find stories with specific themes or plotlines.
You could try searching on fan fiction websites. There are many platforms like Wattpad, Archive of Our Own, or FanFiction.net where such stories might be available if they are popular enough.
FF7 Rebirth doesn't complete the story. It usually leaves room for continuation and builds anticipation for the next installment. The plot might have loose ends or new storylines introduced to keep the franchise going.
FF7 Rebirth has a story that can keep you engaged for a good while. The main storyline alone offers many hours of gameplay, not to mention the optional content that can further extend your experience.