As an instructor I often post Announcements, and as a way to help establish more interaction I think if I could see if the student has read and acknowledged the announcements, at the minimum they could click on an option to “Like” (Thumbs Up). That would be great. …As it currently is, I think when you select “Allow Liking” after your initial announcement post, it is only when someone comments that the opportunity to “Like” is available. If you’re like me, many students don’t comment.
make the "Allow liking" avaliable for the initial announcement post.