Turn on Select and Scroll.
Apple Pencil Pro and Apple Pencil (2nd generation) support Double-Tap to Switch. When Double-Tap to Switch is turned on, you can double-tap the lower part of the Apple Pencil to quickly turn Select and Scroll on and off.
If you change the default setting to Select and Scroll, you can still use Apple Pencil to draw or annotate in Pages. To draw, tap Add and edit drawings