Hello.
I need to find same action as Wait for field changed in old Sharepoint designer application.
For example I need to make a help desk solution. And I want to inform customer when his request is finished.
I made a list Help desk with fields Title, Created by, Status, etc. And I build my flow depends of field Status.
There are three stages
1. Status New, while request is just sent by customer and still not approved or rejected
2. Approved or Rejected when some person will approve it.
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And here i need an action which I am talking about:
Wait for the field changed to Completed
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3. Inform a customer about completion of his request.

This solution is not working
https://powerusers.microsoft.com/t5/Building-Flows/Wait-for-field-change-Action/m-p/39553#M3591