Reccomend

school rivals to lovers~
https://www.mangago.me/read-manga/omae_no_koi_wa_ore_no_mono/
https://www.mangago.me/read-manga/junketsu_drop/
https://www.mangago.me/read-manga/fake_fact_lips/ (not really school but still a good read)
https://www.mangago.me/read-manga/mihanada_pectolite/

& here are some more enemies to lovers rather than rivals to lovers:
https://www.mangago.me/read-manga/tadareta_koi_ni_wa_itashimasen/
https://www.mangago.me/read-manga/bokura_no_tsuzuki/

Hope you enjoy!

Thank so much