Hello SharePointers, Below are Powershell script to get all the version history of all list items in SharePoint online/Office 365.

 $List = $Ctx.Web.Lists.GetByTitle($ListName)
        $Ctx.Load($List)
        $Ctx.ExecuteQuery()
         
      
        $Query = [Microsoft.SharePoint.Client.CamlQuery]::CreateAllItemsQuery()
        $ListItems = $List.GetItems($Query)
        $Ctx.Load($ListItems)
        $Ctx.ExecuteQuery()
 
    
        $VersionHistory = @()
 
      
Foreach ($Item in $ListItems)
        {
write-host "Processing Item:" $item.id -f Yellow
#Get all versions of the list item
            $Versions = $Item.versions
            $ctx.Load($Versions)
            $Ctx.ExecuteQuery() 
            If($Versions.count -gt 0)
            {
                #Iterate each version
                Foreach($Version in $Versions)
                {
                    #Get the Creator object of the version
                    $CreatedBy =  $Version.createdby
                    $Ctx.Load($CreatedBy)
                    $Ctx.ExecuteQuery() 
                    #Send Data to object array
                    $VersionHistoryData += New-Object PSObject -Property @{
                    'Item ID' = $Item.ID
                    'Issue/Rejection Description' =  $Version.FieldValues["Issue_x002f_Rejection_x0020_Desc"]
                    'Resolution Feed'=$Version.FieldValues["Mastering_x0020_Digital_x0020_Co"]
                   
                    }
                }
            }

Happy SharePointing 🙂