Hi Nepali Sandhya,
In general, the Edge browser does not have any feature to hide the address bar for a specific site.
The reason is it may cause security issues for the users.
I would suggest you could add that specific site as app.
Launch Edge-> Settings and more-> Apps-> Install this site as an app
when you launch the app, it will open that site as an application without address bar.
To open other sites, you could keep using the Edge browser, it will show the site with the address bar.
Let me know if you have questions.
Best Regards,
Deepak
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