Sure they could, and any acknowledgement of that will be of use to someone seeking answers about the content of the question regardless of the official state of the rule.
This recently active question showcases the difference quite well: https://rpg.stackexchange.com/questions/169623/artificer-armorer-guardian-attack-and-cantrips-like-booming-blade/187996#187996 the UA tag makes a content distinction, but it also applies to the non-UA. If I asked the same question about the non-UA, then it would be a different question.