Taskbar Layout XML W10/W11, Start XML W10 and Start JSON Win11 - but same Policy location?

We manage 80,000+ workstations for hundreds of hospitals and multiple health authorities. We have a Start Menu and Taskbar XML for each health authority for Windows 10.

We want to use the same Start Menu/Taskbar XML icons for Windows 11 as we have for Win10.

We already have the Computer Configuration\Administrative Templates\Start Menu and Taskbar\Start Layout pointing to the Start/Taskbar XML located on Netlogon that works for Win10 AND Win11 taskbar, BUT with Windows 11 the start layout has to be JSON but the Win11 Taskbar is still XML and there is only ONE GPO location to put both and XML for the Taskbar AND the JSON for the Start Layout?
These web instructions do not show how to do both?
Why is there not another GPO location for the JSON?
https://docs.microsoft.com/en-us/windows/configuration/customize-taskbar-windows-11 
https://docs.microsoft.com/en-us/windows/configuration/customize-start-menu-layout-windows-11 

This one works for everything BUT the Windows 11 Start Menu.

<LayoutModificationTemplate
xmlns="http://schemas.microsoft.com/Start/2014/LayoutModification"
xmlns:defaultlayout="http://schemas.microsoft.com/Start/2014/FullDefaultLayout"
xmlns:start="http://schemas.microsoft.com/Start/2014/StartLayout"
xmlns:taskbar="http://schemas.microsoft.com/Start/2014/TaskbarLayout"
Version="1">
<LayoutOptions StartTileGroupCellWidth="6" />
<DefaultLayoutOverride LayoutCustomizationRestrictionType="OnlySpecifiedGroups">
<StartLayoutCollection>
<defaultlayout:StartLayout GroupCellWidth="6" xmlns:defaultlayout="http://schemas.microsoft.com/Start/2014/FullDefaultLayout">
<start:Group Name="" xmlns:start="http://schemas.microsoft.com/Start/2014/StartLayout">
<start:DesktopApplicationTile Size="2x2" Column="2" Row="0" DesktopApplicationID="Microsoft.InternetExplorer.Default" />
<start:DesktopApplicationTile Size="2x2" Column="0" Row="0" DesktopApplicationID="Microsoft.Windows.Computer" />
<start:DesktopApplicationTile Size="2x2" Column="0" Row="4" DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\Skype for Business 2016.lnk" />
<start:DesktopApplicationTile Size="2x2" Column="2" Row="2" DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\Excel 2016.lnk" />
<start:DesktopApplicationTile Size="2x2" Column="4" Row="0" DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\Outlook 2016.lnk" />
<start:DesktopApplicationTile Size="2x2" Column="4" Row="2" DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\PowerPoint 2016.lnk" />
<start:DesktopApplicationTile Size="2x2" Column="0" Row="2" DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\Word 2016.lnk" />
</start:Group>
</defaultlayout:StartLayout>
</StartLayoutCollection>
</DefaultLayoutOverride>
<CustomTaskbarLayoutCollection PinListPlacement="Replace">
<defaultlayout:TaskbarLayout>
<taskbar:TaskbarPinList>
<taskbar:DesktopApp DesktopApplicationLinkPath="%APPDATA%\Microsoft\Windows\Start Menu\Programs\System Tools\File Explorer.lnk" />
<taskbar:DesktopApp DesktopApplicationLinkPath="%APPDATA%\Microsoft\Windows\Start Menu\Programs\Accessories\Internet Explorer.lnk" />
<taskbar:DesktopApp DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\Microsoft Office 2013\Excel 2013.lnk" />
<taskbar:DesktopApp DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\Microsoft Office 2013\Word 2013.lnk" />
<taskbar:DesktopApp DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\Microsoft Office 2013\Outlook 2013.lnk" />
<taskbar:DesktopApp DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\Microsoft Office 2013\PowerPoint 2013.lnk" />
<taskbar:DesktopApp DesktopApplicationLinkPath="%ALLUSERSPROFILE%\Microsoft\Windows\Start Menu\Programs\Microsoft Office 2013\Skype for Business 2015.lnk" />
</taskbar:TaskbarPinList>
</defaultlayout:TaskbarLayout>
</CustomTaskbarLayoutCollection>
</LayoutModificationTemplate>