It's just below the comment, within the thin black box, toward the left. It says "Like This" in blue clickable text.
If you see my user name below your original post in the light green background next to the words "liked by", it is just above that and to the right of the word "Reply".
Edited 1 time(s). Last edit at 02/21/2020 09:07AM by JustForFun.