scribble disappeared after update ios 15.4.1

Hello there mithun262,

Thanks for posting in the Apple Support Communities.

Since you're not seeing the Scribble setting available, let's confirm this feature is still available in your language. You can locate this information below, as well as here: iOS and iPadOS Feature Availability

Apple Pencil: Scribble

Available on iPadOS

• English (United States)

• English (Australia)

• English (Canada)

• English (India)

• English (Ireland)

• English (New Zealand)

• English (Singapore)

• English (South Africa)

• English (United Kingdom)

• Cantonese (Traditional)

• Chinese (Simplified)

• Chinese (Traditional)

• French (France)

• French (Belgium)

• French (Canada)

• French (Switzerland)

• German (Germany)

• German (Austria)

• German (Switzerland)

• Italian (Italy)

• Italian (Switzerland)

• Japanese

• Spanish (Spain)

• Spanish (Chile)

• Spanish (Colombia)

• Spanish (Mexico)

• Portuguese (Portugal)

• Portuguese (Brazil)

If you see that the feature should be available, try to Restart your iPad to see if that may correct what you see.

Have a great day!

I've noticed the same problem. Scribble is gone and a hard reset didn't fix it.