I can basically Fly with elytra while Flying in creative, I was like trying a new method to go back and forth in my houses but instead I discovered flying while flying wowowoow here's a 30 second video showing the bug:
https://drive.google.com/file/d/1YqIlkwlVT8FaAy48khKWP9nMqlRQ54u-/view?usp=drivesdk