FWIW (1) It was intended to end with James and Tracy driving off into the sunset with her death scene being the pre-title sequence of the next film and was changed when George Lazenby told the producers he wouldn't make another film. IIRC they didn't want two actors playing Bond in the same film or maybe Diana Rigg refused to come back for a reshoot.And Diana Rigg - national treasure - and that last scene.......sorry its too soon
FWIW (2) Radio Four did "You Only Live Twice" in 1990 with Michael Jayston as James Bond and it began with the Tracy's death scene. Incidentally, Burt Kwouk who was in the film was also in the radio play, but in a different part, which I thought was a nice touch.
FWIW (3) when Radio Four did "OHMSS" as part of the Toby Stephens series in 2014 it did end with Tracy's death scene and incidentally New Avenger girl Joanna Lumley (who was in the film) played Irma Bunt, which I also thought was a nice touch. Jarvis & Ayres who make the "current" Bond series for Radio Four haven't done "You Only Live Twice" yet and IIRC the last one was "The Man with the Golden Gun" in 2020.