Use trigger condition in below format:

@equals(triggerOutputs()?['body/PMOFinalApproval/Value'], 'Approved')

OR:

@equals(triggerBody()?['PMOFinalApproval']?['Value'], 'Approved')  

Use correct internal name of your SharePoint choice column.

Use trigger condition in below format:

@equals(triggerOutputs()?['body/PMOFinalApproval/Value'], 'Approved')

OR:

@equals(triggerBody()?['PMOFinalApproval']?['Value'], 'Approved')  

Use correct internal name of your SharePoint choice column, check How to find the Internal name of columns in SharePoint Online?