You're not helping him.
Attendance policy will be in module outlines, course handbooks, university policy on website....
He'll have had multiple emails, invites to discuss with tutors, senior staff, student support
I've been a senior lecturer for many years. It is rare that I have seen a student not attend and do well. It is rare that it gets to the kicking out stage and sometimes students appeal and continue. Of those that do, the majority continue to fall into old patterns.
All of them will be offered help and support. Many of them won't take it.
Many of those have genuine issues as perhaps does your son. Whether or not that means they're in a position to cope with their course is another thing.
Short of just giving them a degree for no work, there's not much we can do for students like this.
Honestly, 9 times out of 10, it's better for student to get kicked out if they don't like their course and theyve missed so much. They'll just carry on racking up fees and might just delay the inevitable.