Thanks for your help, Zach.
I’ve tried each option and learned the following:
1. Drag and drop the parameter with keyframes to the layer you want to apply it to. Just go to the inspector select the parameter ( say position) and drag it to another layer.
This applies the keyframes not to the group but to only the top layer in the group.
2. For the parameter you want to copy, click the arrow on the right side of the parameter and select “Show in Keyframe editor”. From here you can click and drag to select the keyframes and then select another another layer and paste.
This works but only if I add a keyframe to the group first and then paste.
3. You could also use the Match Move behavior.
I didn’t get around to trying this!
I don’t know why I seem to have to insert a keyframe before being able to paste keyframes to a group but it works anyhow so that’s all I care about.
Thanks again for your time and advice with this.