Script ads not showing

Hello guys, I have ad inserted plugin and I want to use my script ad codes with this plugin. But when I insert my ad codes to it, it’s not working at all. I have tried everything but can not find what is problem. Image code blocks and ads are working fine, example before content I am using image ads ( you can find it f12 -> ctrl + f and code-block-1 ), but after content ad block is not working.

<!-- Banner - Test/1x1 -->
<script async src="//code.ainsyndication.com/v2/js/slot.js?21122022"></script>
<ins class="ainsyndication" style="display:block; width: 1px; height: 1px;" data-ad-slot="10439"></ins>
<!-- Banner - Test/1x1 -->

That’s my ad block. How can I fix this problem ? I have tried 2 different ads network companies, codes that I took both of them are not working

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