Link public Jira Issue in Confluence

[Coco _El mejor_]

Hi, I´m trying to show the status of public Jira issues in my confluence pages, like this:

AUT-769 is a ticket of the Company Code Barrel, that present a feature that is not working. I want to let my clients see the status from my Space in Confluence.

So, I made an Aplication Link to https://codebarrel.atlassian.net in my instance. This let me insert jira issues of Codebarrel, but it show this in system config:

I tried disabling reciproce conection for authentication and nothing. In addition, when I navigating between link, Confluence shows the links of instances of CodeBarrel, like this:

I only want to insert links to public Jira issues of external companies and see the current status, without all this configuration. Any ideas?

Cheers,

Agustin.-