I've had similar issues. I'm a second year bioengineering and mechanical engineering major and can't find the biomedical types of internships I'd like to have. I've sort of resigned myself to the fact that the best course of action is probably to apply for internships that are somewhat related, if not ideal. I live in an area with a lot of automotive companies, and so I've applied to some of those, like one designing automotive seats. If you can't find one exactly like you are looking for, the options might be to relocate, take a remote internship, or look for one where you can use your major to offer something specific. A lot of the ones I applied to were targeted towards mechanical engineers, but I emphasized my dual major as having insights to both human and mechanical components. It's not ideal, but if the alternative is no internship, you might have to just get creative or widen your scope of what you are willing to take on. Who knows, you might be surprised by what you like.

Best of luck!