does it have to be bl? cause this ones are good: https://www.mangago.zone/read-manga/match_made_in_heaven_by_chance/
https://www.mangago.zone/read-manga/childhood_friend_complex_eunhi/
https://www.mangago.zone/read-manga/90_s_cram_school_for_unripe_apples/
it's kinda rare to have bl childhood frenemies because most of them have the other having unrequited love hhahha
but this list has a good enemies to lovers trope if you like that:
https://www.mangago.zone/home/mangalist/1002089/
oh i see, then definitely these ones:
https://www.mangago.zone/read-manga/kashikomarimashita_destiny/
https://www.mangago.zone/read-manga/double_trap/
https://www.mangago.zone/read-manga/gunjou_no_subete/
https://www.mangago.zone/read-manga/could_the_boy_next_door_be_a_vampire/
https://www.mangago.zone/read-manga/omega_complex_1/
https://www.mangago.zone/read-manga/suki_de_gomen/
Hellooo i need more recs like https://www.mangago.zone/read-manga/summer_night_lupine/ and https://www.mangago.zone/read-manga/pairing_names/
Practically childhood frenemies (like friends but they hate eachother) to lovers