Why is there so few of reincarnation manga if someone pleaselet me know if there good ones...

they say i was born a king's daughter,
shen yi di nu, the imperial poisonous concubine

How about checking tag.
http://www.mangago.zone/tag/reincarnation/

Thanks

Thanks you

If you want some action kind of reincarnation, try out Omniscient Reader's Viewpoint, it's kinda lke reincarnation, God of Blackfield, Kill the Hero, The Descent of the Demonic Master, Tales of Demon and Gods, Spirt Sword Sovereign, Master of Gu, Mushoku Tensei ~Isekai Ittara Honki Dasu~. Those are all good ones and I recommend you read all of them

Thanks