Clone Formatting of a cell should clone, not just the cell's formatting, but also its Comment's.
My former .XLXS spreadsheet contains lots of comments, many of which have no fill and other problems. I don't want to edit the parameters individually for hundreds of comments.
MacOS Catalina 10.15.2
So yes, this is the case. The formatting of the comment is not copied
I guess we need an assessment whether this is wanted behavior or not from the UX group
LO behavior is currently identical to Excel, the comment format is not copied
We discussed the topic in the design meeting and agree with the request.
If the comment has a complex formatting like <red>ABC</red><blue>DEF</blue> it could simply take the format from the first letter (which is what MSO does).
Interestingly the copy format function works not on complex cell formatting, not only the comment.