I'll just expose myself and say I haven't really watched/read a lot of shoujo anime/manga, but I think these kind of give me that shoujo manga vibe:
https://www.mangago.zone/read-manga/tsumetakute_yawaraka/
https://www.mangago.zone/read-manga/yearning_for_a_night_full_of_you/
https://www.mangago.zone/read-manga/oniisama_e/
https://www.mangago.zone/read-manga/himitsu_no_hanazono/
https://www.mangago.zone/read-manga/hana_ni_arashi_kovachi_luka/
https://www.mangago.zone/read-manga/tamen_di_gushi/
https://www.mangago.zone/read-manga/pink_ribbon/
https://www.mangago.zone/read-manga/the_moon_on_a_rainy_night/
https://www.mangago.zone/read-manga/odoriba_ni_sukaato_ga_naru/
https://www.mangago.zone/read-manga/teiji_ni_agaretara/
https://www.mangago.zone/read-manga/sayonara_rose_garden/
https://www.mangago.zone/read-manga/eventually_i_will_become_yours/
https://www.mangago.zone/read-manga/ano_ko_ni_kiss_to_shirayuri_wo/
https://www.mangago.zone/read-manga/hana_to_hina_wa_houkago/
https://www.mangago.zone/read-manga/aoi_hana/
https://www.mangago.zone/read-manga/ohana_holoholo/
https://www.mangago.zone/read-manga/girl_friends/
https://www.mangago.zone/read-manga/watashi_no_yuri_wa_oshigoto_desu/
https://www.mangago.zone/read-manga/shiroi_heya_no_futari/ (one-shot)
Hello!! Im looking for GL recs that have that very shoujo-y feel that you find in anime, like kamisama kiss, ohshc, wallflower vibes. My life will be yours thank you