Regarding the feature to acquire the public-facing URL holding the security that is applicable to tag

In case of embedding the reports created through Power BI into SharePoint Online, I am aware that the security is protected, but the URL acquired through [Publish to web] is not.
I am thinking of embedding the reports into SharePoint site or its homepage by using tag. However, I am unable to use the tag because of the URL is not protected in terms of security.
I believe that it is the good point that I am able to get the URL protected against security threat, but at the same time, I would say that it is inconvenient if I would be unable to set the display size freely.
So, I hope that I will be able to execute the padding with tag.

If I could use tag to embed the URL to SharePoint Online, I assume that I would be able to embed the reports in the state that they are protective again security theat.
From the perspective of the use of flexible data, I sincerely hope that the feature will be implemented to get the public-facing URL holding security.