You can create a single or multi-node Oracle WebLogic Server cluster with Oracle Cloud Infrastructure database or Oracle Autonomous Transaction Processing (ATP) database as an infra database, optionally, fronted-by a load balancer. Here you would create a stack and modify it as required.
When you create an instance by using the scripts, you will create a public or private subnet in Oracle WebLogic Server for Oracle Cloud Infrastructure.
By default subnets span an entire region in Oracle Cloud Infrastructure. Oracle WebLogic Server for Oracle Cloud Infrastructure supports both regional and AD-scoped subnets. AD subnets are now supported for only existing subnets. In case of regional subnets, single regional subnet is created.