It no longer exists in Windows 10. Most folks didn't like it. But if you want it back again, there is an app which should provide something similar. Read the information in the link below:
https://www.neowin.net/news/windows-10-how-to-get-the-charms-bar-back-using-the-mouse
Hope this helps.
Grif
Hello ,
Ho can I get back the auto hide bar that is on the right of the screen? , It has disappeared !!

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