Why was Attack on Titan episode 87 (Season 4 finale) delayed

The season 4 finale of Attack on Titan (episode 87, The Dawn of Humanity) is to be delayed in both Japan and internationally for online streaming, but why?

Attack on Titan: Everything We Know About the Final Episode (So Far)

The Nature of Time in Attack on Titan - VGCultureHQ

Attack on Titan Episode 87 Delivers Emotional Final Season Part 2

Attack on Titan Fans Still Disappointed over Episode 87 Delay

Attack on Titan: The Final Season - Part 2

Attack on Titan – The Final Season (Episodes 76 – 87) Review

Attack on Titan Final Season Part 2 Finale Trailer Recaps Major Events

Final episode of part 2 going get delayed for 1week. : r

Attack On Titan' Season 4 Part 2, Episode 87 Finale Is Not Airing

Attack on Titan The Final Season Anime's 87th Episode Gets 1-Week

Attack on Titan Final Episode 87 Delayed, New Release Date Set

Attack on Titan Episode 87 Release Date Still Delayed

Attack on Titan' Season 4 Part 2 Episode 12 release date, time

Attack on Titan Final Season: Release Date, Trailer, Plot, Cast