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.
I read some advice somewhere where someone suggested to do continuous fall practice on the first route of the day. e.g. When you’re at the third clip do a fall right at the clip, then halfway to the next clip do a fall, then at the next clip (before clipping in) do a fall. I think this should get you over the fear of falling, at least for that session