But this fantasy setting has magic, which seems to be the ultimate equalizer. Do not try to put our world's logic into another unless it's a 1:1 copy.
My view on it is that, all other things being equal, men will always be stronger then women. Unless of course the story goes out of it's way to explain otherwise. It's like I assume the characters are breathing air until it's said otherwise. We don't know if magic is an equalizer or not.
It could be her strength is 5 physical power + 50 magic power = 55.
Or it could be her strength is 5 physical power x 50 magic power = 250.
Or it could be her strength is the greater of 5 or 50. This scenario is the one where she could be equal to men, but it is unlikely. Otherwise there would be no need to train physically unless it increases magical power itself somehow. But then in his past life he would have endeavored be more buff.
In the case of the other 2 how much stronger a man would be could be a small amount of like 6 vs 5. (Resulting in 56, 300, or something.)
So for me there is nothing yet in the story that shows a man wouldn't be more powerful then her. (All other things being equal.)