How to Get Configurable product children ids Magento 2?

Get all the children product ids from the Configurable product in Magento 2. You can retrieve the list of child item ids by the configurable product id.

Get all Children items of Bundle Products Magento 2.

To fetch all the children items from the configurable product, get Configurable product id and pass it to the method in given code,

Call from the PHP class,

List of all the children items id for a configurable product.

Output:
Array