This is what an Email Security Quarantine Report looks like and what can you do with it:
If the Security Settings -> Force ATP scanning if released option is enabled, the email will go through the ATP scanning flow and the outcome will depend on the ATP resolution: either release or deliver. The Allow Sender action will attempt to release only the email for which the option was clicked. Should more than one email from the same sender be present in the same Quarantine Report email, please use the Release option for the subsequent email after the user has added to the Allowlist otherwise the rest of the email will remain quarantined. All future emails from the email address added to the Allowlist will be directly delivered.