focus mode doesnt work

Hello nargiz128,

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 Focus on your iPhone. Try the steps listed here to see if they resolve the issue: Use Focus on your iPhone or iPad - Apple Support

"Add Focus filters

When you set up a Focus, you can add app filters that determine what information apps will show when the Focus is on. For example, you can show your work calendar only while your Work Focus is on.

1. Go to Settings > Focus, then tap the Focus you want to add filters to.
2. Scroll down to Focus Filters, then tap Add Filter.
3. Tap an app, then select the information you want to see from that app while the Focus on.
4. Tap Add.

You can also use system filters to turn on system settings, like Dark Mode and Low Power Mode, when a Focus is on."

For more help, please reach out to Apple directly here: Get Support

We hope this helps.

Cheers!