Private/Invoke-GraphPaged.ps1

function Invoke-GraphPaged {
    <#
    .SYNOPSIS
        Yields every page of a Microsoft Graph collection request.
    #>

    [CmdletBinding()]
    param(
        [Parameter(Mandatory)][string]$Uri,
        [hashtable]$Headers = @{ ConsistencyLevel = 'eventual' }
    )

    $next = $Uri
    while ($next) {
        $resp = Invoke-MgGraphRequest -Method GET -Uri $next -Headers $Headers
        if ($resp.value) { $resp.value | Write-Output }
        $next = $resp.'@odata.nextLink'
    }
}