https://www.mangago.zone/read-manga/pygmalion_1/ i love this one
https://www.mangago.zone/read-manga/neko_x_neko/
Also Koi Tsunagi (but it's only translated in spanish)
Sharing stories that I liked and where you see an actual switch of top becoming bottom:
https://www.mangago.zone/read-manga/neko_x_neko/ - more popular story of switch
https://www.mangago.zone/read-manga/playtime_with_hakdo/
https://www.mangago.zone/read-manga/outotsu_morning_love/ - anthology one-shots
https://www.mangago.zone/read-manga/like_a_tidal_wave_from_pheromone_shower/
https://www.mangago.zone/read-manga/sayonara_okaeri_itoshisa_ni_koi_ni_tsuite_oshietekurenai_ka/
https://www.mangago.zone/read-manga/wagging_the_tail/
https://www.mangago.zone/read-manga/why_is_it_you/ - if I recall right, the switch is at the end.
https://www.mangago.zone/read-manga/dark_heaven/
https://www.mangago.zone/read-manga/thirst_1/
https://www.mangago.zone/read-manga/zero_at_the_bone/
https://www.mangago.zone/read-manga/kantoku_nekona_ore_wa_dame_desu_ka/
https://www.mangago.zone/read-manga/boy_boy_idol_collection/uu/to_chapter-2/pg-1/ - 2nd story from anthology
https://www.mangago.zone/read-manga/koi_suru_bicchi_no_toro_ana_jijou/ - again, tail-end is where switch at
one of the best: https://www.mangago.zone/read-
manga/pygmalion_1/'
the sex scenes start in the side chapters
sorry the link didnt paste right https://www.mangago.zone/read-manga/pygmalion_1/
this sounds kinda dumb but ive always been kinda sad how I personally have not seen any yaois with switches? its always a top becoming a bottom or vice versa and it stays that way but so far I have not seen one where they actually switch roles from time to time... does anyone know of bls like that?