Unable to get SharePoint site via Entra ID APP client ID and secret value through PNP

[prakashkumarsingh514]

Hi,
I have created APP Id in Entra ID and given API permission "Sites.Selected" and also at SPO site granted "Full control" permission through "Grant-PnPAzureADAppSitePermission"
Now when running below command:
Connect-PnPOnline -Url "https://mytenant.sharepoint.com/sites/FileDocs" -ClientId "r78ede5f-9456-42sd-9h36-e89704077654" -ClientSecret "F3l8Q~Zo7Aiapv3h9KgeOjyi2ie69IMi"

Getting error:
Get-PnPSite: Unexpected response from the server. The content type of the response is "". The status code is "Forbidden".

Can we not use Client Secret in PNP, need help on this.