Lost falsetto

So starting around a year ago, I completely lost my ability to sing falsetto without it coming out airy and raspy. I am 16 years old and singing falsetto was the thing I was the best at when I was younger. I think that hitting puberty potentially could have caused this, or the fact that I stopped singing for a while because I would usually sing stuff that was on the radio while I was in the car (this is before I signed up for 30daysinger) and I didn't do that for a long time because of quarantine. If you know of any way to help me get back my falsetto, I would greatly appreciate it. Thank you.

Hi, Lucah! Here's a short lesson that may help: https://www.youtube.com/watch?v=qkkYVEydx8U. It's a tricky topic to cover without working one-on-one, but I help students in your position by working very gradually, encouraging their voices to "crack" (because they're "cracking" to head voice or falsetto, which is the goal!), and finding the configuration that works best for their specific voice (is it a hum, an airy HOO, singing through a straw, lip trill?). Best of luck to you!