wmcontent_security_policy.links.menu.yml

wmcontent_security_policy.content_security_policy:
    title: 'Content Security Policy'
    description: 'Change settings related to the Content Security Policy.'
    route_name: wmcontent_security_policy.custom_sources
    parent: system.admin_config_system

wmcontent_security_policy.default_sources:
    title: 'Default sources'
    description: 'Sources which are required for the website to function properly.'
    route_name: wmcontent_security_policy.default_sources
    parent: wmcontent_security_policy.content_security_policy

wmcontent_security_policy.custom_sources:
    title: 'Custom sources'
    description: 'Additional sources to allow.'
    route_name: wmcontent_security_policy.custom_sources
    parent: wmcontent_security_policy.content_security_policy