Hi @sachinsoni441,
Do you enable "Allow Multiple Selections" option for the Requester column (Person type column) in your SP list?
I assume that you have enabled "Allow Multiple Selections" option for the Requester column, but do not enabled "Allow Multiple Selections" option for the Manager column.
I have made a test on my side, please take a try with the following workaround:
If one Requestor match only one Manager within your SP list, please take a try with the following workaround:
Set the Text property of the Label control to following:
"Manager: " & LookUp('20190114_case5', User().Email in Requester.Email).Manager.DisplayName
O your side, you should type:
"Manager: " & LookUp('YourEmpAndApproverSPList', User().Email in Requester.Email).Manager.DisplayName
If one Requester could match multiple Managers in your SP list, please take a try with the following workaround:
Set the Text property of the Label control to following:
"Manager: " & Concat(Filter('20190114_case5', User().Email in Requester.Email), Manager.DisplayName & "; ")
On your side, you should type:
"Manager: " & Concat(Filter('YourEmpAndApproverSPList', User().Email in Requester.Email), Manager.DisplayName & "; ")
More details about Filter function and LookUp function, please check the following article:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/functions/function-filter-lookup
Best regards,
Kris