Coyote time is a feature that you need to code it in your player controller (the one that controls the input/movement of the player). Is a really easy thing to add (that can be done pretty much everywhere, so i really don't see why it shouldn't be possible in unity), it requires like 2/3 mins to code, and you can find many great tutorial on how to implement it on the internet, like this one right there (obviously the vid isn't mine):
(Timestamp for coyote jump: 2:45)Hope it was helpful...