That’s not to say she was able to match his skills of combat, but I think being able to fly through space by Force pulling on a ship-attached object certainly qualifies for a sizable amount of Force mastery.
Now that Star Wars has revealed Leia’s Jedi training via Luke, it isn’t crazy to believe she developed her Force abilities to a level akin to Obi-Wan.
Still, to see confirmation Leia accomplished something Obi-Wan did is pretty impressive, and a testament to just how powerful both Skywalker children were throughout their lives.