The trick is ground(actually water) pressure. Simple math: If the average human body is 8 times as tall,wide,deep as the average jesus lizard, it means the Jesus lizard has ground/water pressure only roughly 1/8th of human. So if a very athletic human can wear a pair of stiff pedal 'fins' 8 times the area of a pair of shoes(say 2.8 times longer and wider)he could probably walk on water over short distance. Seems the New Testament Gospels didn’t examine the matter well.
(The same principle why an ant can pull an object many time of its weight but humans can’t.
Check Tsiolkovsky’s writings on the subject.)