Question [HELP] how to drag psb as sprite in animation recording

I am a novice of Unity animation, and I try to drag my psb file to animation recording as a sprite but failed.(I can recording an animation for this psb but I need to drag it in other animation as a sprite)

I can drag the png sprite into it, but psb is not allowed. And my psb file can be place in the scene and add bones on it. I try to looking for answers for hours but can't, I guess this is a simple problem but I just can't figure it out by myself. Here is the psb setting and my unity version is 2021.3.16f1c1.




I tried every setting on it and found out select the Import Mode to "Merged" can be drag in animation, but I cant use the bone of it. I was wondering is it because the animation did't allow two sprite with bone. Any one can help me, this bothering me a lot. Thanks!