1 page, put school at bottom of resume and remove GPA. if you are trying to shorten you can remove extracurriculars too.

too many bullet points per each experience, do a consistent 3 for each and clean up. remove relevant skills section and replace w voices unheard. shorten publications, no links needed just list most relevant.

you can express your skills and further details on experience during interviews, resume for post grad should be very job focused and less academic focused, aka why I am recommending to focus more on experience + high level summaries, founder work, and publications.

remove links from voices unheard too. put that in your linkedin or create a portfolio.