What you need to know:
Delayed: Microsoft are adding a new option in Microsoft Search that allows you to view and manage your personal query history

What you need to do:
With personal query history, you will see recent search queries across SharePoint Online and Outlook (web) as you begin typing in the search box. This prompt makes it easier to return to recently accessed insights and information. No need to bookmark or memorise your frequent queries.

Personal query history can be managed and downloaded through the Microsoft 365 My Account settings:

Settings. A new option enables you to manage your personal query history, such as downloading your history for future reference:

Availability:
For most of us, this feature rollout will begin early April and should be complete by late April 2021.