Your work isn’t bad.
But all you’re showing is mostly the final product.
Other people that chime in to this will probably say something like ‘you need to tell a story’ and you do.
What is that story? Show the story of how you arrived at these end products. Show early concepts/sketches/prototypes in an organized way to show what worked & what didn’t. Show your thinking. You did a little bit of that with the scooter but I find my self wanting more details about what I’m seeing.
Good luck in your job hunt,
RB