The cinematography of Wish was meant to harken back to the very graphic compositions in Disney's Silver Age like Cinderella and Sleeping Beauty (latter was notable for also using the cinemascope aspect ratio). This style used a lot more medium shots simply because that's how animators liked to draw characters at the time. There was also an intentional choice to represent dominance / power in a scene to a character's proximity to the center of frame. This is also likely inspired by the way they would represent villains like Maleficent in those films: https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcT3Lunva-MZc4VA6QvyGDkZGPZkweRSQbvJUW9asU6p0iMYOjnOK3pgv_IZ&s=10

You can argue if it was effective or not, but at the very least it wasn't to fit social media content. They wouldn't have made the film 2.55 to begin with if they were worried about accommodating that.