How to insert PHP code into wordpress (Page Builder)?

Hello.
I created a PHP script for the site, which pulls out the database and forms several DIV elements (quite a lot) that follow one after another. This function works correctly, everything is tested.(without wordpress)
To insert code into wordpress, I use the “Insert PHP” plugin.
The site uses “Page Builder”.
As soon as I insert into the article, he somehow intervenes in the work and breaks the layout.
I looked at the inspector.
Everything should fall inside the

<div class = "article__content"> </div>

block, but only the first two blocks generated by the program get there, the rest is simply inserted into the

<article id = "post-xxx">

section
and the last two even in

<div id = "primary" class = "content-area container">

, then most of the blocks go to the wrong place,
I don’t understand anything. I tried to add it through a homemade shortcode, the result is the same. What is this glitch?