If a creature has cover for an entire combat, should it grant…

If a creature has cover for an entire combat, should it grant extra XP if the higher AC would raise its CR?

@JeremyECrawford If a creature has cover for an entire combat, should it grant extra XP if the higher AC would raise its CR? — AndruC (@AndruC) September 1, 2017 Cover has no effect on a creature’s CR. #DnD — Jeremy Crawford (@JeremyECrawford) September 1, 2017