
Hmm the only manga recommendation i have is Dungeon Meshi, and only if you like the world building and fantasy aspects of The one within the Villainess, since that's the only way they're similar (meaning it's not isekai or turning back time). The world building of this story in many aspects reminded me of dungeon meshi, which is about an adventure party taking a personal quest for the main character.
If you want isekai there's "Milady just wants to relax." Which is similar to this one but where the reincarnated villainess mc takes a peaceful and relaxing route, as mentioned in the title, after the plot takes over and she's eventually ostracized.
Sorry, these are all missing the girl boss theme but it's all I have for manga's, they're good tho and i recommend them!
Can anyone recommend similar manga please~~