That's because it's not part of the franchise. It's a legal loophole side movie that happens to be based off Thunderball... and should not be included in any list of Bond movies unless you are also going to include the old David Niven & Peter Sellers comedy version of Casino Royal and the 1954 Casino Royale teleplay.
Thank you. I did my best.
These things don't fly... they are far too small and made of far too thick of paper to get any kind of aerodynamics... the ratio of weight to lift are too out of whack.