Homescreen blur option not working

Hello Ashisharma17,

Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you're having issues with blurring your Home Screen. Check out the guidance here on how to use this option: Change the wallpaper on iPhone - Apple Support

"Change the wallpaper

1. Go to Settings  > Wallpaper, then tap Add New Wallpaper.
2. The wallpaper gallery appears.
3. Do one of the following: 

• Tap a button at the top of the wallpaper gallery—for example, Photos, People, Photo Shuffle, Emoji, or Weather—to design your wallpaper with a photo, an emoji pattern, a picture of your local weather, and more.
• Tap a wallpaper option in one of the categories—for example, Featured, Suggested Photos, or Photo Shuffle.

1. To customize a photo on your wallpaper, see Add a photo to your Lock Screen.
2. Tap Add, then do one of the following:

• Choose whether to use the wallpaper on both the Lock Screen and Home Screen: Tap Set as Wallpaper Pair.
• Make further changes to the Home Screen: Tap Customize Home Screen. Tap a color to change the wallpaper color, tap  to use a custom photo, or select Blur to blur the wallpaper so the apps stand out."

We hope this helps.

Cheers!