I don’t know how you came to be knowledgeable of this to say with certainty but ask anyone connected to major junior in Canada and they will attest smaller sized player published stats will typically be listed 1+ inch, 10 lbs heavier than actual. That’s reality.
I saw Connor play in Regina 3-4 times and also in the NHL now twice. Visually, he is a thick lower, small/stocky body type. He might just be 5-10, he might just be 5-9. I’m not sure it’s a big difference. He’s definitely not 5-11. He is well under average height for a forward even in todays NHL.