Yes– if you've left a comment on a post and noticed a typo or want to change what you wrote, you can edit the comment.
1. Select the three dots underneath your comment and select "Edit comment".
2. Once you make your change, an edit status with a time stamp will appear next to your name on the comment.
Note: Edits can only be made shortly after posting a comment. If you do not see the "edit comment" option, the window to make changes has passed.