ADA Accommodation makes my principal lose it

Hi! I recently was told I will be getting moved from 3rd to 5th grade. I spoke to my principal before escalating to HR that I need to be eating lunch at noon due to a medical issue and 5th grade lunch is at 1:30. She insisted that I would still be moving to fifth grade to help raise campus scores 🙄. Today I went to to HR to submit a medical excuse signed by my doctor requesting a medical accommodation to keep my lunch at 12 which would basically force my admin to keep me in 3rd grade. My admin was not very happy when she found out I went to HR. Has anyone else had a similar accommodation made for them and how did the district accommodate?