Very new show, with only one episode out thus far.
The premise is that the narrator has found a collection of letters, penned to the eponymous "Museum of the Missing", which is dedicated to the 3.5 million people who just vanished in 1988 (which she doesn't remember happening). A question of whether there's some cross-universe muckery going on, akin to Out of Place, or if it's something the entire world has blanked out.
Relatively simple, as cheekily excused by its narrator, but with an interesting idea at the core of it. Waiting for more.
https://audiofiction.co.uk/show.php?id=20230711-02
Museum of the Missing
Moderator: thecambridgegeek