Let me recommend you two novels of breaking off the engagement + strong female force + fantasy. They are " Fantasy: Breaking off the engagement at the beginning of the story " and " I am Nalan Yanran." The former told the story of the female protagonist's fiancée suddenly becoming useless and being looked down upon by the clan. She remembered the shame of breaking off the engagement and rose up in the future. She became famous in the sect after a battle. The latter told the story of the female protagonist being broken off after her rebirth. However, she relied on her intelligence and courage to survive in the foreign world and finally became a powerful female protagonist. I hope you like these two novels.