Explanation
The database name must be unique among all Autonomous Data Warehouses and Autonomous Databases in your tenancy in the same region.

Terminating an Autonomous Transaction Processing database permanently deletes the instance and removes all automatic backups. You cannot recover a terminated database.
the maximum number of CPUs and maximum storage capacity that can be provisioned in Oracle Autonomous Database In the current release up to 128 CPUs and 128TB can be provisioned from the cloud console.
Customers requiring more resources need to call their Oracle account team

Setting Up a Remote Peering
Create the RPCs: Each VCN administrator creates an RPC for their own VCN's DRG.
Share information: The administrators share the basic required information.
Set up the required IAM policies for the connection: The administrators set up IAM policies to enable the connection to be established.
Establish the connection: The requestor connects the two RPCs (see Important Remote Peering Concepts for the definition of the requestor and acceptor).
Update route tables: Each administrator updates their VCN's route tables to enable traffic between the peered VCNs as desired.
Update security rules: Each administrator updates their VCN's security rules to enable traffic between the peered VCNs as desired.

Explanation
The Oracle Cloud Infrastructure provider is used to interact with the many resources supported by the Oracle Cloud Infrastructure. The provider needs to be configured with credentials for the Oracle Cloud Infrastructure account.

Reference https://docs.cloud.oracle.com/en-us/iaas/Content/Block/Tasks/restoringavolumefromabackup.htm