If your friend shares a picture/story, a picture/story that is originally on some other page/group/profile. Normally you have two choices, you click the image/story and comment on the original link on the page its originally posted on, or you can comment on just that particular share that your friend made.
On the FB app if someone shares something and you click the comment button, it takes you to the original page and you can't comment just on your friend's timeline. Funnily enough you can see the number of comments/likes, you just can't see those comments or make one. You can however do all of this from the people hub.
On the FB app if someone shares something and you click the comment button, it takes you to the original page and you can't comment just on your friend's timeline. Funnily enough you can see the number of comments/likes, you just can't see those comments or make one. You can however do all of this from the people hub.