Most of what you said is spot on except for FF16. FF16 is an action RPG that is somewhat of a fusion between Devil May Cry 5 and Final Fantasy with Game of Thrones style storytelling. It's currently PS5 exclusive but will probably get a PC port down the line.
The game that's possibly a prequel to 1 is the spinoff game Stranger of Paradise: Final Fantasy Origin. I haven't finished SoP yet but it definitely seems that way.