Custom mob animation not showing

Hello.

So I created a new mob (like player model) using blockbench. I did the model with the different folders (body, right arm, left_leg etc)..

https://cdn.discordapp.com/attachments/657262131477217281/711696687076212776/unknown.png

I exported the model and remove the // because it doesn't work. But when it ask me to chose for animations I have this

https://cdn.discordapp.com/attachments/657262131477217281/711697557608464485/unknown.png

The fact is when I export in minecraft 1.15 version it work but obviously mcreator doesn't like it.
Anyone can help me with that ?

(sorry for bad english)