The first half of your giant is beautiful!
I’m seeing a break in body tension on the upswing. Your tap position starts off strong, but then you tap by bending your hips. The shape change in a tap—from stretch to hollow—should be generated from your core with flat hips (no piking). On the upswing, I can also see you bending your arms, sticking your ribs out, moving your head, etc. Not only do these form breaks kill your power at the top of your giant, but they are symptoms of a lack of body tension in your core and shoulders. In the clip that I attached, you can see how loose you are.
To strengthen your core for giants, I recommend hollow body rocks with a rubber band. As you rock back, really tug on the rubber band to exaggerate overhead body tension. You can even do these rocks on a wedge mat (head downhill of feet).
Another drill I like is back extension roll to handstand. Can you do this with perfect form on the floor? A lot of problems in giants show up in the back extension roll. Quiz yourself to see if you are piking, bending your arms, sticking your head out (etc.) in your back extension roll.
Don’t forget to spend more time on the strap bar. It’s a great tool for perfecting giant swings without killing your hands.
Keep up the good work!