Can I apply to transfer to a new school while deferred from one?

Hi all!
So, last year I attended a school “x” and decided that it wasn’t the right fit. I applied to transfer and ended up commiting to school “y”. I am currently deferred from Y for the year because of COVID.
During this gap year, I’ve realized that school Y isn’t actually the best fit for me. I’m wondering if I can apply to transfer to other schools while keeping my deferred spot at school Y? I’m afraid of applying, not getting in, and losing my spot at school Y.
Anyone with experience regarding this??
Thank you!