What new functionality is available for iPad?

Squeeze Gesture: Quickly switch tools or show the picker where the pencil is hovering.
Feedback Generators: Enhanced drawing and writing experience with Apple Pencil Pro.
UI Touch and UI Hover Gesture Recognizer: Provides barrel roll angle for more expressive drawing tools.
Undo Slider: Squeezing Apple Pencil Pro presents an undo slider for quick undo history navigation.
PK Tool Picker: New API to integrate custom drawing tools with deep support for Apple Pencil Pro.

For more details, you can check out the session What’s new in UIKit.

Multi-App Mode: Allows secondary apps like notepads, spreadsheets, assistive apps, coding apps, and a new calculator app to run simultaneously.
Customization for Education: The new calculator app can be customized for classrooms and standardized exams.

For more details, you can check out the session What’s new in device management.

Document Launch Experience: Redesigned for document-based apps to showcase their identity and provide a great browsing experience.
Tab Bars and Sidebars: Visual updates and a new combined sidebar experience with customization features.

For more details, you can check out the session What’s new in UIKit.

Redesigned Function Row: The new Magic Keyboard for the M4 iPad Pro features a redesigned function row for Arabic, mirroring volume and brightness keys between hardware and software.

For more details, you can check out the session Build multilingual-ready apps.

Custom Resizable Controls: Create custom controls like buttons and toggles that can live in Control Center or the lock screen and be activated by the action button.

For more details, you can check out the session What’s new in SwiftUI.