Power Automate is great for sending Email Confirmations to specified users. However, sometimes you need to send a confirmation email back to the originator (i.e., the person who triggered the Flow) in the first place - e.g., to confirm a Document has been approved. Strangely, using the User Email property in the v3 Send Notification action doesn't work!
However, you can get this to work by specifying the originator as an expression, and setting the value of that expression to be:
... you can see an example in the screenshot below.
A little unusual, a little fiddly - but it works!