AWS Control Tower API

You can basically use any of those mechanisms to setup your landing zone. You could use CLI, with a command like this:

aws create-landing-zone
--manifest <value>
[--tags <value>]
--landing-zone-version <value>
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]
[--debug]
[--endpoint-url <value>]
[--no-verify-ssl]
[--no-paginate]
[--output <value>]
[--query <value>]
[--profile <value>]
[--region <value>]
[--version <value>]
[--color <value>]
[--no-sign-request]
[--ca-bundle <value>]
[--cli-read-timeout <value>]
[--cli-connect-timeout <value>]

which could be very helpfull if you want to execute it from command line due to given parameters, or to make it repeatable.

Another option, if you have a need for scripting the landing zone creation, would be to leverage the SDK/Boto3, using the create_landing_zone function, a syntax similar to this in your code:

response = client.create_landing_zone(
    manifest={...}|[...]|123|123.4|'string'|True|None,
    tags={
        'string': 'string'
    },
    version='string'
)

These are examples for creating a landing zone, however, you could use the other functions to interact with Control Tower function without using the console.