Can’t speak for them, but I dont think there has ever been much of an attempt to have any continuity or back story linking any of the movies , up until the recent Daniel Craig set of movies.
Each movie was
“You know this character James Bond, secret agent, charming, deadly etc”
" here are some bad guys, maybe specter was mentioned elsewhere"
“Here is a bond girl”
“Here are some supporting characters that do stuff you know”
" occasional throwaway 4th wall breaking gag because they not completely un self aware"
"here is the story and the movie , enjoy or not , catch you in a year or two for the next one "
That’s about it. No need to explain continuity , backstory, who is 007 or 006 or what happened to 1/2 of london getting destroyed in the last movie , because it’s not relevant to this story we are about to see.
Continuity or back story was never planned in to any great extent so it was never developed in the movies so there is little point trying to find one.
The books had some continuity but they are not the movie world so no point looking for enlightenment there.
The Craig set of movies are basically a superset of that with some continuity between movies, but nothing to do with the Pierce Brosnan or any other era’s.
Basically don’t look for reason where none was intended , that way lies madness.
Haven’t seen the latest so maybe they have started to build in a back story and continuity, but that would be a new thing so what ever happened on previous movies is no longer relevant.