How do you know you are choosing the right projects to showcase? Should you limit yourself to strictly UX projects?
Unless the application specifically asks for it, you don’t need to limit your portfolio to any kind of project. Projects can be from your class, internship, volunteering, personal project, etc.
Interviewers are often looking for competence (how are your basic design skills), complexity (how challenging are the problems that you have tackled), and style (your unique design philosophies/preferences). One way to choose projects could be to pick one that shows your core thinking and design skills and one that is an interesting, challenging problem.
If you pursue other creative endeavors (ex. art, music, architecture, filmmaking, etc) that can show relevant skills to your ideal role, don’t hesitate to include some select highlights as long as they don’t overshadow your main content. Having a variety of skills is great as a designer!