Yes at Disneyland, I've seen it on at least two occasions that I remember. Now its possible it was just those specific circumstances like a female CM wasn't available so they had a male CM just take the role for that day rather than them specifically being hired for the role, I dunno. But I've personally see it on at least two occasions that I remember. I've also seen it in videos from various Disney Vloggers, so it seems to me its on a regular enough basis that its what I would consider common.
Can you link me to a video please?
Entertainment CMs can’t just take a role for the day. It doesn’t work like that.