I have a iPad 3gen pro… and can not find scribble. Is it not supported?

The option for the Scribble feature can be activated in the Settings app, under the Apple Pencil settings panel.

Your iPad Pro model should support this.

My iPad Pro model is much older than yours and Scribble is supported.

Depending on where you are from, Scribble may not be supported, if the language of your country is not supported.

You need an Apple Pencil 2nd generation. Also check Settings > Apple Pencil > Scribble.

You need the correct Apple Pencil 2 and your language needs to be supported by the Scribble feature.

Tap the link below.

iOS and iPadOS - Feature Availability - Apple

Here’s what I see (iPad Pro 11” 4th Generation, iPadOS 17.0.3).

Check MichelPM’s response regarding language and Feature Availability.