Many (most?) universities have a system of allowances for students with particular medical conditions/learning difficulties including dyslexia, dyspraxia and others. The most common allowance is extra time in exams. Sometimes this can be an extra half or whole hour but in other cases can be, for example, 8 hours allowed for a 3 hour exam.
There are various arguments in favor of giving this extra time but of course the merits of doing so can also be debated.
When the student graduates, as far as I know no universities include a record of this extra time on their official transcript. This appears to hide an important piece of information from a potential employer and also makes it very hard to compare one set of grades with another or to interpret the significance of any particular set of grades. Of course an employer might not care how long it takes a student to solve a problem or write an essay as as long as they do it well. But for some employers it might make a crucial difference.
Why don't universities provide this information on the official grade transcript that a student gets?