The only one I can think of is BL Game no Shujinkou no Otouto de Aru Koto ni Ki ga Tsukimashita
Here are some satirical BL/ stories where self aware protagonist is in a BL world—I hope some of these are new to you!
https://www.mangago.zone/read-manga/mobyama_aji_to_mobtani_crou_no_kareinaru_nichijou_e_no_chousen/
(Kind of a reverse of zettai bl ni naru—2 mob characters in a BL world determined to become protagonists…they will do whatever it takes)
https://www.mangago.zone/read-manga/i_took_a_trip_to_an_otome_game/
(Straight protagonists isekai’d into an otome game and is romanced by all the guys, similar bc he has to “dodge” flags from the male love interests)
https://www.mangago.zone/read-manga/super_seme_sama_to_toki_wo_kakeru_ore/
(Just general satire of BL tropes)
Also these two— female protagonists who are aware they live in BL worlds!!
https://www.mangago.zone/read-manga/fight_on_yeo_manager/
https://www.mangago.zone/read-manga/renai_flag_zero_joshi_no_meisou/
I FUCKING LOVE YOU BRO OMG LETS MAKE OUT
thank u so much y'all~~~
Any manga reco like thiiis?