How to compare authorizations array

At present once the policy is deployed, any changes in the authorisations in the parameters will not make the policy non-compliant as the policy rule only checks for managedByTenantId

I can use the Microsoft.ManagedServices/registrationDefinitions/authorizations[*] to compare the length of the existing authorizations with managedByAuthorizations parameter value and Microsoft.ManagedServices/registrationDefinitions/authorizations[*].roleDefinitionId for roleDefinitionIds of the authorizations, however I am not able to use / find aliases to compare all the values in the authorizations array in policy rule
Attached is what works so far.

Is there a way to do that that I am not aware of?