Share to "People with existing access" breaks role inheritance

StephenRice , This powershell is at least a start, but I can't get this to work on any SPO site that has been created by an O365 Group, hence a SPO site created by Teams. It will work on any site created from SPO Admin Tenant.  Will this be available to work on SPO Sites created by Groups? It will be essential to our architecture, often times we have the Teams site and Group ownership for the Team but then they will have content that needs to be shared outside of the Teams and we use the attached SPO site for this which has assigned permissions access that have been given to a larger group, minus the associated Document Library. For groups can you use -DefaultSharingLinkType and change that parameter to Existing Access somehow?

Set-SPOSite -identity https://*******.sharepoint.com/sites/BPM -DefaultLinkToExistingAccess 1

Set-SPOSite : https://******.sharepoint.com/sites/BPM is a Groups site collection. The valid parameters for this
type of site collection are '-Identity', '-AllowSelfServiceUpgrade', '-DefaultLinkPermission',
'-DefaultSharingLinkType', '-DenyAddAndCustomizePages', '-DisableCompanyWideSharingLinks',
'-DisableSharingForNonOwners', '-LockState', '-Owner', '-ResourceQuota', '-ResourceQuotaWarningLevel',
'-SandboxedCodeActivationCapability', '-SharingCapability', '-ShowPeoplePickerSuggestionsForGuestUsers',
'-SocialBarOnSitePagesDisabled', '-StorageQuota', '-StorageQuotaReset', and '-StorageQuotaWarningLevel'.
At line:1 char:1
+ Set-SPOSite -identity https://******.sharepoint.com/sites/BPM -De ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Set-SPOSite], ServerException
+ FullyQualifiedErrorId : Microsoft.SharePoint.Client.ServerException,Microsoft.Online.SharePoint.PowerShell.SetSi
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