Does Leia has force?

I think she had Force powers for sure, although maybe not enough to be a Jedi Knight - not that she'd want to be a Jedi Knight. She had more important things to do.

Of course as of ANH she wouldn't have a clue why she had power over weak minds, any more than Luke understood why he was better at bullseyeing womp rats than the other boys. She learned about the existence of Force power in ANH, had the first hint that she had capabilities at the end of TESB, and didn't Luke tell her that she would learn The Force towards the end of TLJ?

Well clearly after TLJ, we know she does. I would say he didn't know because they were so dormant. She wasn't aware of them yet, and apparently even after training chose to use it minimally, so I guess it just hid it enough so he didn't see it.