Is it possible to store APNs certificate in external vault (Hashicorp, Azure Key Vault)?

To enable sending push notifications we need to upload APNs certificate in p12 format in iOS App configuration, as described here:

In Auth0 tenant dashboard there is an option to select and upload APNs certificate to the vault in the tenant.
Is it possible to upload APNs certificate to external vault, like Hashicorp or Azure Key Vault
and use Management API for the Auth0 tenant to use APNs certificate from that external vault?