Below are the levels of Permission for Shared Drives. You must make all user changes though the weblink drive.google.com
To add members and set access levels:
Requires Manager access
On your computer, go to drive.google.com.
At the left, click Shared drives and double-click one of your shared drives.
At the top, click Manage members.
Add names, email addresses, or a Google Group.
New members must have a Google account. By default, new members are Content managers. They can upload, edit, move, or delete all files.
To change:
Permissions for a new member, click the Down arrow and choose an option.
Whether new members get notified, click Notify people.
Click Send.
Requires Manager access
On the left, click a shared drive.
At the top, next to the shared drive name, click the Down arrow Manage members.
Next to a member’s name, click the Down arrow and select a new access level.
Click Done.
Requires Manager access
On the left, click a shared drive.
At the top, next to the shared drive name, click the Down arrow Manage members.
Next to a member’s name, click the Down arrow and select Remove member.
Click Done.
Note: If you remove someone from a shared drive, they might still have access to files shared in other ways, such as files shared with everyone in your organization by link or through a group.
Other Useful Links
This link explains what you can do with Shared Drives and How to Share and collaborate in Shared Drives. https://support.google.com/a/users/answer/9310351?hl=en&ref_topic=9298590
This link explains what people can do with folders after you share with them.
https://support.google.com/drive/answer/7166529?hl=en&co=GENIE.Platform%3DDesktop#zippy=