This function was available in the previous page edit,
but how to operate in the new edit?
This feature is not available in the new editor I think (see https://community.atlassian.com/t5/Confluence-discussions/New-and-improved-file-uploading-experience-in-Confluence-Cloud/m-p/1234893#M6541)
However, if you have the image opened by URL in a separate table, you can right click the image and click 'Copy' and paste into the Confluence page.
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