Ok so let's start from the beginning. Games are made out of pixels, pixels are tiny squares that have a value for things like hue, brightness, alpha etc. A thing that most people don't know is that every game is a 3D game the onlt difference between classic 3D games and "2D games" is the camera. That's what makes a game "2D". Now, with that information, if I make a square out of 16 pixels and then change the camera the square will became a cube right? (assuming we also give the square some depth obviously). So now, what stops me from multiplying the pixels and scaling the graphics on and on until we make a cube out of let's say 2000 x 2000 x 2000? Because it's still pixel art, just scaled and yet it won't look like pixel art. Hmmmm time to make Fortnite 2 for this jam boys!
TLTR: By scaling pixels it's technically still considered pixel art even if the sprite is bigger than 32, 64, 128, 512 etc.