Peter Parker was shown interacting with Brie Larson’s Captain Marvel and watching as all these heroines teamed up on the battlefield, but in reality, Tom Holland had to participate in this sequence on his own.
At least Matt Aiken and his VFX team at WETA made Holland inclusion as seamless as possible.
It’s a wonder that so much of Avengers: Endgame’s climactic conflict managed to have all the actors together on stage, but this is one instance where schedules weren’t 100% able to mesh together.