<Installation>
<InstallationTarget Id="Microsoft.VisualStudio.Ssms" Version="[22.0,)">
<ProductArchitecture>amd64</ProductArchitecture>
</InstallationTarget>
<InstallationTarget Id="Microsoft.VisualStudio.Ssms" Version="[22.0,)">
<ProductArchitecture>arm64</ProductArchitecture>
</InstallationTarget>
</Installation>
With SSMS 22 you can now use this: