I have completed the Microsoft Ignite Data Analyst 2021 Challenge but it shows that I have only completed 8/16 challenges even thought I have completed all the modules in the collection. All modules are 100% completed. It has been over 12 hours since I completed it.
This is an known issue and the team is actively working to fix it. If you want to reach out to CloudSkillsHelp@Microsoft.com they'll provide you an update when the issue is resolved. Otherwise, I'll update you here.