I have found this article Share photos for comments and feedback in Lightroom Classic CC
I have successfully figured out how to delete comments but the same attempt doesn't work for likes. Any suggestions?
Using Adobe photoshop lightroom Classic CC 7.3.1 release
This is in Collections - Grid view - and at the bottom of right hand side column. A right click in the blue area will give you the option to delete a comment but not any of the likes. Thanks in Advance,
The documentation obviously doesn't match the current behavior. Please add your constructive opinion to the bug report I just filed: Lightroom Classic: Can't delete likes from photos synced with LR CC, contrary to Help | Photoshop Family Customer Commun… Be sure to click Me Too and Follow in the upper-right corner -- this will notify you when the bug's status changes.
Adobe has indicated that they are not planning to put any more effort into sync between LR 7 (Classic) and LR CC. So most likely they'll just correct the documentation to match the current behavior.
Thanks for reporting. The Help Document is in error. I've requested it be modified.