i compared the policies in the admx template with the policy template for MacOS and found some missing policies in the policy_manifest.json. Some are missing for obvious reasons like IE integration or SmartScreen for others i'm not sure about the reason since they are for example mentioned in the description of related policies.
Here a complete list of the missing policies:
AllowTokenBindingForUrls - Configure the list of sites for which Microsoft Edge will attempt to establish a Token Binding with. ApplicationLocaleValue - Set application locale BackgroundModeEnabled - Continue running background apps after Microsoft Edge closes ClickOnceEnabled - Allow users to open files using the ClickOnce protocol ConfigureOnPremisesAccountAutoSignIn - Configure automatic sign in with an Active Directory domain account when there is no Azure AD domain account ConfigureShare - Configure the Share experience DeleteDataOnMigration - Delete old browser data on migration DirectInvokeEnabled - Allow users to open files using the DirectInvoke protocol ForceNetworkInProcess - Force networking code to run in the browser process FullscreenAllowed - Allow full screen mode InternetExplorerIntegrationLevel - Configure Internet Explorer integration InternetExplorerIntegrationSiteList - Configure the Enterprise Mode Site List InternetExplorerIntegrationSiteRedirect - Specify how "in-page" navigations to unconfigured sites behave when started from Internet Explorer mode pages NonRemovableProfileEnabled - Configure whether a user always has a default profile automatically signed in with their work or school account PinningWizardAllowed - Allow Pin to taskbar wizard RendererCodeIntegrityEnabled - Enable renderer code integrity RequireOnlineRevocationChecksForLocalAnchors - Specify if online OCSP/CRL checks are required for local trust anchors SendIntranetToInternetExplorer - Send all intranet sites to Internet Explorer SmartScreenForTrustedDownloadsEnabled - Force Microsoft Defender SmartScreen checks on downloads from trusted sources SpellcheckLanguage - Enable specific spellcheck languages SpellcheckLanguageBlocklist - Force disable spellcheck languages