hi all, is it possible to manually delete an tempo entry when we know

For which Appian version would this be? Please check the following post:

forum.appian.com/.../e-190628

@eaglez I would like to suggest you to refer documentation at https://forum.appian.com/suite/help/16.1/Deleting_a_Tempo_Feed_Entry.html which clearly describes the deletion topic and its consequences.

The only way I know is, once when you got a feed entry id with you, access the entry manually by constructing a URL (for instance, https:///suite/tempo/news/entry/). Once when you are able to access it, you should be able to delete it if you are a system administrator. (Reference: 'Note' under 'Add Entries' section at https://forum.appian.com/suite/help/16.1/News.html#Add_Entries).

If your question is re the deletion of a comment (though I don't think so), Appian till date spoke about deletion of entry, but not its associated comments.