In the Yesterday (2019) movie, we see near the end, couple other people who knew that the Beatles band existed, shared the address of John Lenon to Jack, after which the latter confronts him.
How is this possible? Is this an alternate timeline where all these four famous artists of the band survive and live ordinary lives without any musical contribution? Because in the normal timeline (John's musical life), he would be assassinated in 1980. Do the others (Paul, Ringo and George) also live in this timeline as John the same way without any contribution?