Dear,
When my flow send Approval e-mail to approver, at the top line, it is always my e-mails address and my name,
instead of the real Requester's.
Could any one tell me what went wrong?
Thanks in advance.

Dear,
When my flow send Approval e-mail to approver, at the top line, it is always my e-mails address and my name,
instead of the real Requester's.
Could any one tell me what went wrong?
Thanks in advance.
As far as I know, 'REquested by' represents the user whose credentials were used to execute the flow.
Much more info on this long thread:
https://powerusers.microsoft.com/t5/Building-Flows/Approval-Process-Requested-By/td-p/92897
Hope this helps