Explanation
To share report folders with different groups of users with different levels of access, an administrator can use folder sharing settings under setup. Folder sharing settings allow administrators to share report folders with public groups, roles, roles and subordinates, territories, or portal roles with view or edit access. In this case, the administrator can share the Helpdesk folder with Support Agents with view access so they can run Helpdesk reports but not edit them; and share the R&D folder with Support Managers with edit access so they can view and edit R&D reports. References:
https://help.salesforce.com/s/articleView?id=sf.reports_builder_folders_sharing.htm&type=5