Does it matter perhaps if the C+ was paid for, or if not paid, the upgrade to C+ cleared in advance of bag drop?

My general experience also as a FO is that I am usually not upgraded to C+ (assuming I get it) until after my bags are dropped. Thus if C+ = bag priority, which may or may not be the case..., regardless at bag drop I wont get the priority sticker, because at that point I am not “priority” yet.