Certification for Students / Recognition as International Online School

As impressive the backup and concept of khan Academy is, I am wondering why

a) Khan Academy is not a recognized international school and

b) no certifications for completed courses are available for students

With such international backup, it should be easy for Khan Academy to get the accreditation as an international online education institute! Certifications would enable students to get their skills recognized.

Under such conditions Khan could offer courses or class programs. Then likely more parents would be prepared to support and donate for recognition! Particular under present worldwide conditions imposed by COVID-19.