Please be advised we are talking Avengers: Endgame, a movie where for many people literally knowing even one iota of information about the film is a ruinous spoiler!
Avengers: Endgame — which is now playing in several international markets, including China and various European countries — doesn’t have a mid-credits or post-credits scene per se but it does have … something you should nevertheless stick around for after the end credits are done rolling on the 181-minute superhero epic.
As with all MCU movies, the last image seen after the end credits roll in Endgame is the Marvel Studios logo. But this time, rather than a score or simply silence, there is s curious sound effect.
Source: IGN.com Does Avengers: Endgame Have a Post-Credits Scene?