Giving certain plugin access to the client.

I want to give certain plugin access to the client. The client also has administrator access. For example, I want to give only access to Defender or Smush. But the problem is as they have also admin power my client can do this to access all in wp-admin

1. Client goes to wp-admin
2. Deactivate WPMU DEV Dashboard
3. Reactivate it again
4. They gain access to my WPMU DEV Dashboard and they can see all plugin lists and active and deactivate them.

How can I achieve such a workflow? Please check and help.