Hello.
Create a New "Automated cloud flow" to start with a flow that triggers automatically.
For the trigger, select "When an item is created" from the SharePoint connector.
Choose the Site Address of your SharePoint site.
Select the List Name from which you want to trigger the flow.
Click on new step and search for and select the "Send an email (V2)" action from the Office 365 Outlook connector
In the "To" field, you need to specify the recipient. Typically, this is the email address of the user who created the item.
Make sure your SharePoint list has a field that stores the user’s email address or use the default field that captures the creator’s email.
To get the user's email in a SharePoint list item using Power Automate, you can use the Created By field, which is automatically populated by SharePoint when a user creates a new item. This field contains information about the user who created the item, including their email address.