'Kill the villainess'
'Death is the only ending for villainess'
'The villainess' -- this ones not really a historical plot, it's more of a reverse isekai and it's about school life and friendship and mental health stuff, but it's really good, has romance. I only reccomend it cause it is a villainess but a small plot and the rest is an actual good story too.
'I’m a Villainess, Can I Die?' -- hasn't updated in forever but it's a good story, if u like it read the novel maybe
'The villainess lives twice'-- perfectly fits your description
'A step mothers marchen'-- it's not exactly an isekai, but a time reversal, but it's got amazing plot and amazing politics stuff and ofc romance
'The one within the villainess' -- perfectly fits your desc
I've read many of Korean one and some were good and some were just half good and half bad without any kind of plots, and if there is any plots then it all just ass one ╥﹏╥. Can someone recommend me more better one. With action, politics, romances yes, but also not letting themselves be distracted by it. As they have to get revenge!! Thankyou (づ￣ ³￣)づ