1.Create a csv file as following picture show.
2.Please run below PNP PowerShell.
$SiteURL = "https://tenant.sharepoint.com/sites/emilytest"
$filePath = "C:\pnp.csv"
$csv = Import-CSV $filePath
Connect-PnPOnline -Url $SiteURL -Interactive
ForEach($Row in $csv) {
Set-PnPWebPermission -User $Row.user -AddRole $Row.permission
}
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