You need to bake your maps.(Color, Roughness, Metal, Normal/height, etc.) You are mixing multiple normals(Bump) and mixing them into 1. The exporter doesn’t know which is which. GLTF is designed for standard PBR output. Meaning a principled BSDF with images plugged into it.
You can include all textures, but it won’t be setup for you and I’m not sure if AE can import it. To do that: File->Export->glTF->On right hand side expand material->Unused Textures and images->Check Unused Images. Note: If you check Prepare unused images it includes data that doesn’t fit into the glTF specification.
