How to perform operations if a command is not covered by the CLI for Microsoft 365

Function Get-ListAttachments() {
    param
    (
        [Parameter(Mandatory = $true)] [string] $AccessToken,
        [Parameter(Mandatory = $true)] [string] $SiteURL,
        [Parameter(Mandatory = $true)] [string] $ListTitle,
        [Parameter(Mandatory = $true)] [int] $ItemId
    )   
    Try {
        $ListItemAttachmentsEndPoint = "$($SiteURL)/_api/web/lists/getbytitle('$($ListTitle)')/items($($ItemId))/AttachmentFiles"
        $Header = @{
            "Authorization" = "Bearer $($AccessToken)"
            "Accept"        = "application/json; odata=verbose" 
            "Content-Type"  = "application/json "
        }
        $ListItemAttachments = Invoke-RestMethod -Uri $ListItemAttachmentsEndPoint -Headers $Header -Method Get  
        return $ListItemAttachments.d.results
    }
    Catch {
        throw "Error Getting List Item Attachments! $($_.Exception.Message)" 
    }
}
Function Download-ListAttachments() {
    param
    (
        [Parameter(Mandatory = $true)] [string] $TenantName,
        [Parameter(Mandatory = $true)] [string] $SiteURL,
        [Parameter(Mandatory = $true)] [string] $ListTitle,
        [Parameter(Mandatory = $true)] [string] $DownloadDirectory
    )   
    Try {

        #Get All Items from the List
        $ListItems = m365 spo listitem list --webUrl $SiteURL --title $ListTitle -o json | ConvertFrom-Json -AsHashtable
         
        #Iterate through each list item
        Foreach ($Item in $ListItems) {
            Try {
                Write-Output "Processing Item Id $($Item.Id)"

                # Right now AttachmentFiles property is not available in cli-microsoft365 so we need to execute a separate query to /_api/web/lists/getByTitle('list-title')/items(item-id)/AttachmentFiles to get the item attachments. 
                # AttachmentFiles endpoint requires access token 
                $AccessToken = m365 util accesstoken get --resource "https://$($TenantName).sharepoint.com" --new 

                #Get All attachments from the List Item
                $Attachments = Get-ListAttachments -AccessToken $AccessToken -SiteURL $SiteURL -ListTitle $ListTitle -ItemId $Item.Id

                If ($Attachments.Length -gt 0) {
                    #Create directory for each list item if it doesn't exist
                    $TargetDownloadDirectory = "$($DownloadDirectory)/$($Item.Id)"
                    If (!(Test-Path -path $TargetDownloadDirectory)) { New-Item $TargetDownloadDirectory -type Directory | Out-Null }

                    foreach ($Attachment in $Attachments) {
                        Try {
                            Write-Output "Downloading $($Attachment.FileName)"
                            $TargetFilePath = "$($TargetDownloadDirectory)/$($Attachment.FileName)"
                            #Download attachment
                            m365 spo file get --webUrl $SiteURL --url $Attachment.ServerRelativeUrl --asFile --path $TargetFilePath
                        }
                        Catch {
                            Write-Error "Error Downloading This Attachment! $($_.Exception.Message)" 
                        }
                    }
                }
                else {
                    Write-Warning "Attachments Not Found For This List Item!"
                }
            }
            Catch {
                Write-Error "Error Downloading This List Item Attachments! $($_.Exception.Message)"
            }
        }
    }
    Catch {
        Write-Error "Error Downloading List Attachments! $($_.Exception.Message)"
    }
}

#Set Parameters
$TenantName = "tenant-name"
$SiteRelativePath = "site-relative-path"
$ListTitle = "list-title"

$DownloadDirectory = "$($PSScriptRoot)/$($ListTitle)"
$SiteURL = "https://$($TenantName).sharepoint.com/$($SiteRelativePath)"

#Call the function to download list items attachments
Download-ListAttachments -TenantName $TenantName -SiteURL $SiteURL -ListTitle $ListTitle -DownloadDirectory $DownloadDirectory