can I use apple pencil on glass protection

Glass screen protectors are a 50/50 chance of losing some screen sensitivity with the Apple Pencil or ANY smart, Bluetooth stylus.

You may fair better with a much thinner, plastic screen protector.

Depending on what you are using your Apple Pencil for, you might want to consider a matte screen protector to give your iPad screen more tooth/pencil drag.

The drawback with these matte screen protectors is that they noticeably impact the clarity/resolution of the iPad’s screen.

Good Luck to You!