Turns out Abbey Road and Let It Be weren't meant to be the last albums the Beatles recorded

Anyone who’s watched Let It Be, the documentary made from video of the Beatles recording (and arguing about) their final songs together as a four-person group, would assume there was never any way John, Paul, Ringo, and George would be willing—or able—to release another album together. Fans of the band have long assumed that Abbey Road, which was mainly recorded and originally intended to be released after 1970's Let It Be, was the last proper Beatles album the group had planned to make before their break-up.
As detailed by The Guardian’s Richard Williams, in a profile of Beatles expert Mark Lewisohn, this isn’t the case. A taped meeting from September 8th, 1969 shows that The Beatles had planned to record another album, with its lead single timed for a Christmas release of that year.
The meeting described by Lewisohn and Williams occurred just before Abbey Road’s release. In it, the band (aside from Ringo, who’s in the hospital) talk about the unrecorded album’s format. John “proposes a new formula” that would’ve seen “four songs apiece from Paul, George, and himself, and two from Ringo.” He also “refers to ‘the Lennon-and-McCartney myth,’” hinting his and Paul’s previously shared song attributions “should at last be individually credited.”