historical??

Not smut but this one is a great historical BL
https://www.mangago.zone/read-manga/beauty_and_the_brawn/

Palace of Bardo
Beauty and the brawn

https://www.mangago.zone/read-manga/a_proxy_painter/
https://www.mangago.zone/read-manga/two_souls_1/

This one has been doing well so far:
https://www.mangago.zone/read-manga/bongchon_bride/
And this is my personal Historical BL/GL list if you're interested.
https://www.mangago.zone/home/mangalist/1148336/?filter=&page=1

chinese, european, korean, or like what type of historical?

any

draig mid knight,
gongmul
tale of the yellow dragon
the dragon's first love *shounen ai but very cute*
lmaoooo i just realised most is about dragons oof but I hope you enjoy mwah