How can I access parameters passed from iframe src in Visualforce page. Lightning Page Iframe: <<iframe src="{!v.VFUrl}" width="100%" height="500px;" frameBorder="0"/

In VF page trying to access like:

Visualforce.remoting.Manager.invokeAction(
'{!$RemoteAction.GPD_StakeholderSchedulerPageController.getStakeholder}', '{!$CurrentPage.parameters.projectId}', function(results, event){... }

But unable to access, is there anything i'm wrongdoing. Can anyone help me out please.

How can I access parameters passed from iframe src in Visualforce page. Lightning Page Iframe:

<iframe src="{!v.VFUrl}" width="100%"  height="500px;"  frameBorder="0"/

In VF page trying to access like:

 Visualforce.remoting.Manager.invokeAction(        
    
'{!$RemoteAction.GPD_StakeholderSchedulerPageController.getStakeholder}',
    '{!$CurrentPage.parameters.projectId}',
         function(results, event){...
}

But unable to access, is there anything i'm wrongdoing. Can anyone help me out please.