Can anyone recommend some 9.5+ rated historical manhwas? reincarnation transmigration what...

Paljae (shounen ai though)

you should read turning, antidote, or regas!

Omg peak being mention

https://www.mangago.zone/read-manga/secret_lady/

https://www.mangago.zone/read-manga/bring_the_love/

https://www.mangago.zone/read-manga/the_prince_of_myeolyeong/

https://www.mangago.zone/read-manga/the_broken_ring_this_marriage_will_fail_anyway/

These are 9.4 but I think they're underrated:

https://www.mangago.zone/read-manga/is_it_a_fortune_or_is_it_a_woe/

https://www.mangago.zone/read-manga/i_raised_cinderella_preciously/

https://www.mangago.zone/read-manga/concubine_walkthrough/