child pages listed and categorized

> a dynamic list of child pages in parent theme and categorize them

I’m not sure you are using the correct terminology.
What do you mean by child pages ?
And what is it specifically about this site you are trying to replicate ?
https://www.studiokreatura.pl/portfolio/

Ah sorry I misspelled that, I meant parent page not parent theme. When I create wordpress page and choose a parent page (“Home” in this case):
https://imgur.com/a/Z4FEfgM
I need it to be automatically listed on this page (“home”) and categorised (lets say i want this page to be under “all” and “projects” category).

This link:
https://www.studiokreatura.pl/portfolio/
is showing what i am trying to make on my wordpress site.
And These:
https://www.studiokreatura.pl/portfolio/w-poludniowym-sloncu/
https://www.studiokreatura.pl/portfolio/gdanski-spichlerz/
are the child pages of a parent page (in this case “portfolio”).

@ragariusz

https://www.studiokreatura.pl/portfolio/
If you are displaying this list based on Category, then all the posts you Categorize with zrealizowane-projekty will automatically show on this page.

If you want a particular category to of posts to display on your home page, then you will need to update your homepage template to include those posts.

You also have a license to ask support from the theme developer :
https://themeforest.net/item/oshine-creative-multipurpose-wordpress-theme/9545812/support

The links i posted are not from my website. My friend asked me to make a portfolio simmilar to this one on his site with an option of easily inserting new projects. The problem is that blog and posts are planned for a different purpose on this website (writing articles in different part of website), not for portfolio and i don’t want to show portfolio pages in the “show all posts” part.I thought maybe there is a way of just making new pages(not posts) with category, adding them to portfolio and organizing by category?