Use SharePoint web parts to showcase data from inside and outside Office 365

In follow up, the work-around we went with was to manually add the Web parts we required to a page, use PnP to retrieve the properties, which of course included the internal GUID of the Web Part (Planner in our scenario). I then realised that you can use the GUID in place of the instance for the component parameter when using Add-PnPClientSideWebPart, as specified within the comments in https://github.com/SharePoint/PnP-PowerShell/blob/master/Commands/WebParts/AddClientSideWebPart.cs

[Parameter(Mandatory = true, HelpMessage = "Specifies the component instance or Id to add.", ParameterSetName = ParameterSet_DEFAULT3RDPARTY)]
[Parameter(Mandatory = true, HelpMessage = "Specifies the component instance or Id to add.", ParameterSetName = ParameterSet_POSITIONED3RDPARTY)]
public ClientSideComponentPipeBind Component;