Automatic overview page of the children's pages

Is there a possibility with a structure that is built as follows

-Parent1
–Parent1_1
—Real Wiki Site
–Parent1_2

Have an automatic wiki page created on the Parent1 and/or Parent1_1 pages that shows an overview of your children’s pages?

Currently, if you click on e.g. Parent1, the page does not exist and can be created.

a1
a2

Thank you very much

BR

See https://extensions.xwiki.org/xwiki/bin/view/Extension/Children%20Macro/ or https://extensions.xwiki.org/xwiki/bin/view/Extension/Documents%20Macro

Thank you very much