In most of the countries I have stayed/lived, cross-gender interactions are more like a mind game than anything else. Women are neither supposed nor encouraged to be flirty or openly approachable. Wondering if there are countries where it’s not such the case as a cultural specificity.
If you’re attractive, you’ll be attractive anywhere.
If you’re not…just go to the Philippines/thailand/ any SE Asian country… you’ll be good. Or Colombia or some south American countries. But you have to be more careful of being robbed…
That answers your question. Good luck.