How to add children using React.cloneElement?

Question

React

For example, there is a code

React.cloneElement(children, { ...children.props, id }, children.props.children)

In addition to the children of the child (sorry for the pun), how can I also add, say, another div?
Upon attempt

React.cloneElement(children, { ...children.props, id }, children: <div>Some test div</div>)

expectedly frays the original children