Got lead certified recently, but I pretty much drop a grade when climbing lead - I’m not as confident and I overgrip.
I’ve done lead falls, I know how to do 'em well, and yet… as someone who’s done top rope for many years, it’s scary not feeling the tension (however small) of a rope pulling your harness up.
Exposure therapy. The more falls you take, the less anxiety you’ll feel when facing the next fall.
Unfortunately, the fear comes back over time if you don’t take falls, so you need to keep doing it. As they say, if you’re not falling, you’re not trying hard enough.
I have experienced the opposite. The longer I’ve been leading, the more afraid of falling I become.