AFAIK, there are only couple of policy API are available as shown in below screenshot , please check the doc for available SDK for those policy are in the GIT - https://github.com/microsoftgraph/msgraph-sdk-go/tree/main/policies ,
For SafeLinksPolicy , you have to check through PowerShell - https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/set-up-safe-links-policies?view=o365-worldwide .
Hope this helps
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