Microsoft / Office 365 exchange online anti-spam quarantine --- release , end user notification

 https://help.protectedtrust.com/configure-end-user-spam-notifications-in-exchange-online

not sure the classic portal still effective 

1. In the Microsoft 365 Defender portal, go to Email & collaboration > Review > Quarantine.

an Admin can preview the quarantine message from Microsoft defender

If you want to allow end-user notification, refer to the following

I just create a custom policy to enable end user review, delete and release

https://security.microsoft.com/quarantinePolicies