Pros and cons of restricting user access to certain regions

Hello, Are there any drawbacks I should be aware of if we restrict user access to only a single region?

We use a variety of AWS services but mainly S3 and Sagemaker Studio. Our team is located in various locations so their default regions are different. It has been a challenge to keep track of studio instances when they are created in different regions so we are now considering restricting access to a single region. Are there issues that we may face in that case? Any services we may miss?