Dak's thrown a ball over 60 yards in the air, arm strength is not an issue. Doesn't have a cannon for an arm, but then again guys like Jeff George did, and how many SBs did he win?
Probably 95% of NFL throws are less than 50 yards, while quarterbacks need to make shorter, faster throws, which require arm strength, again, the vast majority of throws don't require a cannon for an arm.
Dak's NFL draft profile said "Has enough natural arm strength and hip snap to fit throws into an NFL window".
To me, that means he DOES have an "NFL caliber" arm...