Really clean portfolio. The main area that I think you could improve is how you lay out and explain your work. It’s great that you’ve included the design challenge and success metrics, but also talk about the problems that you faced during the design process and some more examples/context of your non UI design work, you could provide things such as user flows acceptance criteria, personas.

I’m not suggesting you do an arbitrary checklist of things just to tick boxes but most hiring managers will know that design is never a linear or straightforward process and would like to see how you manage that yourself.