Within the Work and Activities section, you can list up to 15 total experiences, each with up to 700 characters of description. Of those 15, you can mark up to 3 as "Most Meaningful," which unlocks an additional 1,325 characters specifically to reflect on each one.
Use that extra space for genuine reflection, not more description. Admissions committees already understand what a scribe or an EMT generally does day to day. What they don't already know is what the experience specifically changed about how you think, what you now believe about medicine, or how it shifted your approach to patients.