Is it even possible to open animate files in after effects for the sake of exporting it to Lottie?

Hi all,
I have some animations I did in ANIMATE (all vector materials) and I was asked to export them as Lottie files for the web. As I understand it's not possible to export ANIMATE to Lottie directly, I tried to open one of those Animated files in After Effects and then tried to export it to Lottle, only I don't see anything. Is it even possible? Someone tried that?
It will be way too much work to remake those vanimations again from scratch in AE for me.