I know this reply is sort of late, but I sent a follow up email to my dream school and I just reiterated how much I wanted to attend the school, why I think I would be a good fit, and why the school is a good fit for me. I also mentioned a few updates on things I’ve accomplished since applying. The admissions committee seemed really receptive and said that knowing I was still interested is helpful in terms of managing the waitlist. Overall, I don’t think it could only help to follow up, schools love knowing you’re still excited about their program! Best of luck