I use Elementor builder working under WORDPRESS. Elementor builders have a widget, which shows me WP posts(or pages) related to some categories or tags. But there is an option, to make your own filters based on WP_Query:
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I need to create filter, to show only child pages of this current page.
'Parents/childs' is basic feature of WP.
The project fee is $5
Sir, I can edit the ELEMENTOR builder to show child pages of the current page.I can start the work immediately.I have 9 years experience in Wordpress and PHP. Thanks RJay.