Since Lightroom doesn't have a native Instagram button on desktop, many users use third-party plugins like LR/Instagram to post directly from their catalog.
You can access your Lightroom cloud photos directly within Adobe Express to create designed social posts or carousels using templates.
In the Library module , use the Publish Services panel to set up connections to platforms like Facebook or Flickr. Once authorized, you can drag photos into these collections and click Publish to upload them.