See https://blog.neilsabol.site/post/sccm-system-center-copy-clone-content-between-distribution-points/

SCCM-copy-clone-content-between-distribution-points.ps1

# Specify the FQDNs of the source and destination distribution points
$sourceDP =  "MEMCMDP1.contoso.com"
$destDP = "MEMCMDP2.contoso.com"

# Suppress error messages (usually because content already exists on the destination)
$ErrorActionPreference = "SilentlyContinue"

# Get all content from the source DP
# See https://learn.microsoft.com/en-us/powershell/module/configurationmanager/get-cmdeploymentpackage?view=sccm-ps
Get-CMDeploymentPackage -DistributionPointName $sourceDP | %{
	[int]$currentContentObjectTypeID = $_.ObjectTypeID
	$currentContentID = $_.PackageID
	$currentContentName = $_.Name
	# Use ObjectTypeID identify the type of content
	# See https://learn.microsoft.com/en-us/mem/configmgr/develop/reference/core/servers/console/sms_objectcontentinfo-server-wmi-class
	# Then, start distribution of the content to the destination DP
	# See https://learn.microsoft.com/en-us/powershell/module/configurationmanager/start-cmcontentdistribution?view=sccm-ps#-inputobject
	switch($currentContentObjectTypeID) {
		2 { Get-CMPackage -Id $currentContentID | Start-CMContentDistribution -DistributionPointName $destDP }
		14 { Get-CMOperatingSystemInstaller -Id $currentContentID | Start-CMContentDistribution -DistributionPointName $destDP }
		18 { Get-CMOperatingSystemImage -Id $currentContentID | Start-CMContentDistribution -DistributionPointName $destDP }
		19 { Get-CMBootImage -Id $currentContentID | Start-CMContentDistribution -DistributionPointName $destDP }
		21 { }
		23 { Get-CMDriverPackage -Id $currentContentID | Start-CMContentDistribution -DistributionPointName $destDP }
		24 { Get-CMSoftwareUpdateGroup -Id $currentContentID | Start-CMContentDistribution -DistributionPointName $destDP }
		31 { Get-CMApplication -Name $currentContentName | Start-CMContentDistribution -DistributionPointName $destDP }
	}
}