Hi Naresh Chandra,
Welcome to Microsoft Q&A!
The original Brilli Gallery Locker app for Windows Mobile is no longer available in the Microsoft Store because Windows Phone support ended years ago. However, the same developer has released an updated version designed for Windows 10/11:
You can check that out to see if it's similar to your experience with Brilli Gallery Locker. Feel free to keep me posted with your feedback!
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