Amazon Affiliate Native ads and Text+Images Affiliate links won’t go live in WordPress

This is my first time asking a question.

I am working for this website and my job is to add Amazon affiliate links to the blog posts.

The problem is, when I add text links or image links, they work fine. But when I add text+image affiliate links or Native ads, they do not show up once I save/update the blog.

Everyone in tutorials say that this should be simple copy-paste but it is not. I add links in the text section but still, that does not change anything. I also removed the plugin that I thought could cause the problem but still, it is all the same.

This error has nothing to do with any adblocker in the website or my browser. This is also not an issue with hosting. I have worked on this issue for many hours but I do not have a clue.

Please help.