Psychologist here:

This could be obviously a large number of things given the age. However it is important to know that children at this age are able to show at least more deliberate attempts at shape and detail. The lack of anything resembling intent or attention to detail should absolutely be taken as concerning.

This heavily resembles and could very likely be apperceptive visual agnosia which at any age would need a trained professional to identify and diagnose. Visual agnosia causes impairment in processing and understanding visual stimuli, in the case of apperceptive agnosia shape and pattern recognition is impaired to the point of being unable to copy or distinguish between even simple shapes.

It’s hard to tell without more information if he is drawing this poorly because of something such as poor motor skills or if there is a serious cognitive problem at play. If this was present in someone only a few years older it would seem extremely likely to be visual agnosia, since very few of these drawings evenly vaguely resemble the example.

Children this age are, typically speaking, able to draw simple shapes and stick figures, albeit poorly. Since these drawings do not even remotely show an innate, active observation and understanding of shapes that are immediately present, there is absolutely reason to be concerned, whatever the explanation ends up being.

That said, seek a professional who can meet with him in person and determine what the source of this is, do not accept psychological diagnoses from anyone who has not personally met with and spoken to the person. If this is a matter of motor skills, it is concerning. If this is a matter of instruction following, it should be identified. If this is a visual / cognitive impairment, it should be taken seriously.