Correct me if I'm wrong but couldn't you in the past license Stock Image though a layer in Photoshop ? Quite difficult to license lets say twenty images in a sea of 250+ preview images.
Yes you can from either the layer or the library if you have libraries set up. Simply right click on them and choose license image. You still can only do one image at a time though.
It sounds as if I can right click an image placed into the composition though a library as a Adobe Stock image and choose license image and it will work; that is exactly what I was doing previously it appears as though it's gone?
If you are doing it from within the composition you likely don't have the correct layer chosen. Just select it in the layers panel and do it there. Very easy.