How to add more ads just in some articles? Is there a setting or a trick?

Sure ??

Paragraph numbers can have the following (comma separated) values:

– value 1 or more means paragraph number
– negative value -1 or less means paragraph number counted from the opposite direction as configured
– value between 0 and 1 means relative position in post or page (e.g. 0.3 means paragraph 30% from top or bottom)
– negative value between -1 and 0 means relative position in post or page counted from the opposite direction as configured (e.g. -0.3 means paragraph 30% from the bottom if Count is set to From Top)
– 0 means random paragraph position
– %N means insertion every N paragraphs

https://adinserter.pro/documentation/paragraph-settings

You can also define minimum number of paragraphs:
https://adinserter.pro/documentation/paragraph-settings#counting

Check also
https://adinserter.pro/documentation/additional-block-settings#word-count

https://adinserter.pro/documentation/individual-post-and-page-exceptions

Thanks for the reply.
But my question was different.
How do I add more AdSense codes to long articles? (Not in all articles published on the site).
How to proceed? Can you explain? And I don’t understand how

Specify more paragraph numbers.

Limit insertion to posts/articles with desired number of paragraphs.

OK and how to do that? How to specify more paragraphs numbers and limit insertion to post/articles? Can you explain me? Is there a guide?

Please check the documentation as described above.

You can configure multiple insertions with one block.
You only need to specify paragraph numbers.

Maybe this demo page with practical example can help you:

https://adinserter.pro/demo/automatic-insertion-between-paragraphs

Please note that you can simply specify paragraph numbers (no need to use Filter).