This old Pose Library is the one that now it's found in the Asset browser, right?
And poses are saved from the Action editor? :think:
Yes catboigalore ,
Poses are now stored as Assets (double clicking on a Pose in the Asset Browser will apply that Pose to the Selected Bone(s):
However, as far as I know, and Wayne knows this better than I and might need to correct me, they are not saved from the Action Editor.
If you bring up the N panel in the Action Editor, you get the pose library aswel, just checked it =3