To answer your question, yes. Once you add a user or a team member to your QuickBooks account, they can get their own ProAdvisor Certification through the Training tab.
I've tried adding my colleague as a user and she was able to access the said certification. See the sample screenshot below:
In case you need to change the user's permission, you can take a look at the following articles. This will provide you with steps on how to review their certifications as well as frequently asked questions about the ProAdvisor Certification program:
Hope you're doing great. I wanted to see how everything is going about accessing the training tab for ProAdvisor users. Was it resolved? Do you need any additional help or clarification? If you do, just let me know. I'd be happy to help you at anytime.
Looking forward to your reply. Have a pleasant day ahead!