The feature has been announced and is currently under development.
The "Help Me Write" feature will be available on Gmail and Google Docs. This feature will assist users in composing emails and writing sections by using limited inputs provided by the user. Additionally, the company mentioned that the feature would begin to roll out as part of our Workspace upgrades.
While talking about the feature, Google CEO Sundar Pichai gave the example of requesting a carrier for a refund on a trip when he talked about the new feature.
Say you received an email informing you that your flight had been cancelled. Although the airline has offered you a voucher, you actually desire a complete refund. You may use "Help me write" and swiftly draft an email.