To answer the question, no. Unused assets are not packaged into the iOS IPA file you get after packaging.
To get my game under the 2 gig limit, I did a lot of texture packing as @MMMarcis instructed me to do. I also removed some models, materials, and textures entirely by deleting them from my maps and replacing them with other models already in use.
It is amazing that large games like COD mobile can stay under 2 gigs. Basically you have to stay away from 4K textures as much as possible. That’s were all the space really comes from is the textures.