According to wiki.vg the Animation Packet has 2 animations, swinging either main or off hand:

https://wiki.vg/Protocol#Animation_.28serverbound.29

However, the PlayerAnimationType of the PlayerAnimationEvent only has one animation in its enum so far: ARM_SWING (probably main hand?).

If this event should also satisfy the clientbound packets (as the cancellable state suggests), then there are more animations missing, like criticals and magic criticals. I also ask this as the javadoc for the event is not really helpful, only stating, "Represents a player animation event".

https://wiki.vg/Protocol#Entity_Animation_.28clientbound.29