According to the documentation, you can undo automatic investigation remediations for things such as Task Scheduler entries and quarantine. This is particularly useful for getting buy-in to enabling fully automated remediation, rather than approval based.
In my environment, there is no option for undo in the flyout pane for either a single historic action centre entry or multiple. Specifically, I am trying to undo the removal of a scheduled task. Are there prerequisites for this, or am I missing something else? Devices are Windows 10 2004, hybrid Azure AD joined, using MDAV as the engine, and still onboarded to MDE.