Multisites in joomla: Content update from another admin panel? - joomla

I have basic question regarding Joomla multisite.
I have two website which is in joomla.
For example :
demo1.demo.com
demo2.demo.com
And if i am usig multisite feature. Is it possible to update content of demo2.demo.com from admin panel of demo2.demo.com

Find the joomla extenions Below link helpful https://extensions.joomla.org/category/core-enhancements/multiple-sites

This is certainly possible depending on how you implement multisites.
For example, Virtual Domains can be configured to work this way.

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If you want a Magento frontend view which is admin manageable (with your own custom database tables) try this piece I wrote: link. Hope it suits you.
You should add a custom module to add that.
Check this link
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In my website project, three people are assigned to write new articles for the website. They write their own articleS and cannot view their fellows' articles. We have one supervisor who is supposed to view, edit, and manage all articles.
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