Some anima in unity

This time, I managed to import the mannequin and its animation into unity. You can see: the character animates as he walks and you can see him "waving" by pressing the spacebar. P1

This is done through unity's animator, which first imports three animations, idle, wall and wave, then when the game starts, the idle animation plays by default, the walk animation starts when there is any back and forth movement, and finally the wave animation, which plays when you press space. P2

But I have a problem with my idle model, it doesn't share the avatar with the other two animations, so it doesn't switch between them smoothly.