I doubt that CC would know how to check the 'girt' bar
CC check, double-check and operate the girt bar every time they arm/disarm a door: Additionally, all CC will be trained in door opening/closing from both inside and outside, even if company policy is for them not to open from the outside.
Often doors have not been disarmed from the inside as CC have lots of things on their minds when the FC give the order
Do you actually have any experience as operating Cabin Crew?