A Microsoft file hosting and synchronization service.
Hello,ARViz
Welcome to the Microsoft community!
I have realized that you Can't access shared folder.
According to your description,whether this client shared folder is operated by you?
If you don't see the folder, the permissions on the shared folder don't write you in.
I have not been able to determine the cause of the problem due to the information you have currently provided, if it is convenient you can provide more precise information so that I can confirm your problem.
Here's a copy of the instructions for OneDrive shared folders that you can check out.
Share OneDrive files and folders - Microsoft Support
If you’ve followed the steps in this article and still need help, email the OneDrive support team.
Feel free to post back if you need further assistance.
Thank you for your understanding and patience and I look forward to hearing from you.
Ryan - MSFT | Microsoft Community Support Specialist