I place the advertisement code on my second site, it is visible in the code, but the ads are not displayed.
Maybe you need some settings?

Hi
In this case we need to check the issue on your site.
1. Edit your first post.
2. Click switch below main text field: prntscr.com/fk3hdg
3. Provide your site details: backend URL, admin credentials and FTP: prntscr.com/fk3hwz
4. Let us know that you provided credentials by posting in the same thread.


Also, let us know the details of ads that is not showing.

Regards

On the same site is displayed, but on the outside does not.

Hi
The superuser details you added are not working. please check and correct theme.
Also to show ads on other site have a look on the steps given here adagency.ijoomla.com/show-ads-on-any-site

Hope it helps.

Regards