Purchased CC All Apps for Students - Only get 6 apps instead of all 20?

Revert to trial https://helpx.adobe.com/manage-account-membership/cc-reverts-to-trial.html may help
-and troubleshooting FAQ https://community.adobe.com/t5/Get-Started/Troubleshooting-FAQ-What-should-I-do-if-I-have-a-membership-but/td-p/7601068
-and https://helpx.adobe.com/creative-cloud/kb/cloud-website-shows-trial-purchase.html

Try to relogin into your Adobe account. If this doesn't help you have to contact the Adobe support, because this is a public forum, not the link to Adobe support.

Sorry, but we're normal users and we can't help with account and/or payment problems

Please click the link below to contact Adobe staff to help.

Be sure to remain signed in with your Adobe ID before accessing the link below.

You have to allow 'cookies' in your web browser for this to work

https://helpx.adobe.com/contact.html

Click the chat icon in the lower right and type "agent" to get a human and not the chat bot