ACR Values support with OIDC Provider configuration

Dear,
I’m trying to configure OIDC provider and I have to add to the Authorization URL the ACR values field useful to associate the contract filter defined on Identity provider.

I have already try to add “acr_values” to the provider_config map of authentication method configuration but it doesn’t seem to work.

How can I add this field to the authorization url generated with login command?

Thanks in advance