Optional ReadonlycreateDefines whether or not the StackSetExecution role is created in all workload accounts and if the StackSetAdmin role is created in the management account. If you are using stacksets and set the value to false, you will need to ensure that the roles are created.
Default value is true.
CustomizationsConfig
Description
Defines custom CloudFormation and external web and application tier resources. We recommend creating resources with native LZA features where possible.