private/core/Get-PolicyAssignmentTarget.ps1

    function Get-PolicyAssignmentTarget {
        [CmdletBinding()]
        param(
            [Parameter(Mandatory = $true)]
            $Assignments
        )

        if (-not $Assignments -or $Assignments.Count -eq 0) {
            return "None"
        }

        $includedTargets = @()
        $excludedTargets = @()

        foreach ($assignment in $Assignments) {
            $isExcluded = $assignment.target.'@odata.type' -eq '#microsoft.graph.exclusionGroupAssignmentTarget'

            if ($assignment.target.groupId -and $assignment.target.groupId -ne "") {
                $groupName = Invoke-ZtGraphRequest -RelativeUri "groups/$($assignment.target.groupId)?`$select=displayName" -ApiVersion v1.0
                if ($isExcluded) {
                    $excludedTargets += $groupName.displayName
                }
                else {
                    $includedTargets += $groupName.displayName
                }
            }
            elseif ($assignment.target.'@odata.type' -eq '#microsoft.graph.allDevicesAssignmentTarget') {
                $includedTargets += "All Devices"
            }
            elseif ($assignment.target.'@odata.type' -eq '#microsoft.graph.allLicensedUsersAssignmentTarget') {
                $includedTargets += "All Users"
            }
        }

        # Build grouped assignment target string
        $assignmentParts = @()
        if ($includedTargets.Count -gt 0) {
            Add-Member -InputObject $Assignments -MemberType NoteProperty -Name IncludedTargets -Value $includedTargets -Force
            $assignmentParts += "**Included:** " + ($includedTargets -join ", ")
        }

        if ($excludedTargets.Count -gt 0) {
            Add-Member -InputObject $Assignments -MemberType NoteProperty -Name ExcludedTargets -Value $excludedTargets -Force
            $assignmentParts += "**Excluded:** " + ($excludedTargets -join ", ")
        }

        if ($assignmentParts.Count -gt 0) {
            return $assignmentParts -join ", "
        }
        else {
            Add-Member -InputObject $Assignments -MemberType NoteProperty -Name AssignmentSummary -Value "None" -Force
            return "None"
        }
    }