Models look great and I love that bow has stretching deformation, but you need to level up your work ethic. Upon importing in unity models do not have their materials linked and scales are messed up. Also some models have garbage like light sources and camera in their hierarchy.
These things are easily fixable and there are info about how online.
You will only benefit as a professional if you learn how to make things you sell "just work". We just have 3 popular 3D engines, you can probably figure out how to make 3d models work natively in them in an hour or two and be set for life.