If you'd take it then I'd recommend this manhwa. It's not in this site tho but it's free on webtoon. It's quite funny and interesting. The MC transmigrated into the body of a crazy beggar and he has to make the ML who's a Duke and was already once his lover fall in love with him but the Duke is actually obsessed with the second prince which was the MC's former body before he died and transmigrated.
https://m.webtoons.com/en/canvas/second-chance-first-world/list?title_no=872050
https://www.mangago.me/read-manga/the_fallen_duke_the_knight_who_hated_him/
https://www.mangago.me/read-manga/two_souls_1/
https://www.mangago.me/read-manga/mo_dao_zu_shi_novel/
https://www.mangago.me/read-manga/bad_friend/
https://www.mangago.me/read-manga/to_be_or_not_to_be/
https://www.mangago.me/read-manga/stuck_in_my_sister_s_dating_sim/
https://www.mangago.me/read-manga/yoake_no_uta/
https://www.mangago.me/read-manga/heaven_official_s_blessing/
https://www.mangago.me/read-manga/eternal_covenant/
https://www.mangago.me/read-manga/a_proxy_painter/
https://www.mangago.me/read-manga/to_take_an_enemys_heart/
Does anyone have any historical, fantasy, royal BL recommendations?