How to get children skus list from configurable product?

I know to load children skus with loading parent object but I am finding the way where I can load all children items by just passing configurable product id, is there any method please share here
thank you
it works fine with below method but it requires to load parent object

$configurableProduct=$this->productRepository->getById($parentId);
//MagentoConfigurableProductModelProductTypeConfigurable
$options = $this->configurable->getConfigurableOptions($configurableProduct);