
Actually "The King and His Knight" is exactly the medieval-themed fantasy manga with the "Strong Female Lead" tag that you're talking about, which inspired me initially. I was kind of expecting something like that. If you haven't read it already, I highly recommend! Lives up to the tag name for sure.

A woman does not only have one way in bring strong. Being strong does not only mean physical strength or force. Brains are very important and I think the MC is using it as much as she can run. Remember that this us a hyper patriarchal society and a woman like her can't just go around doing whatever just because her family favours her

Yah, I totally agree that "strength" is multifaceted. Still, I think the romance subplot is too distracting of a diversion from the "let's reform society" narrative. It's time for the MC to enjoy the fruits of her labor with enchanting her family members, securing an outstanding husband, and awakening formidable powers of her own.
I started reading this story because I gained interest in the "Strong Female Lead" tag recently, a big change for a BL-loving fujo at heart. The MC has gained enough power to change the misogynistic society, which was the premise of this narrative. I already have little interest in hetero-romance, but now that this subplot has been going on for at least 20 episodes, I'm really at the end of my patience. Hoping that the MC can actually take control of her Saintess powers and stop acting like a damsel in distress all of the time.