Azure Cosmos DB: Can point-in-time restore target a different existing Cosmos DB account?

We need to restore Azure Cosmos DB data from SourceAccount to DestinationAccount, where DestinationAccount already exists.

The documentation covers restoring to the same account or to a new account, but we could not find an option to restore directly into another existing account.

Is this supported?

If not, what does Microsoft recommend for restoring the data and moving it into the existing target account?

We currently create a temporary Cosmos account from restore, then copy data across to DestinationAccount. It seems inefficient and expensive.