Initially, Avengers: Endgame did not have a Post Credit scene, because it is indeed the ENDGAME.
We know now that the end of Marvel Phase 4 was not Endgame, but Spider-Man: Far from Home. The reason being it shows the world after dealing with the multiple snaps.
Starting today at the end of the Endgame it will show the trailer for Spider-Man: Far From Home.
If you haven’t seen it.
Flip the page to check it out.