The touch pens are divided into two styles: iPad specific and tablet phone universal. For iPad specific stylus function Detachable pen tip. Power display.
Pencil by FiftyThree Digital Stylus Pencil 53 for iPad & iPhone - Walnut 53PW01
New Generic Pencil Stylus For Apple iPad Silicone-Tip Capacitive Stylus Pen
Apple Pencil (1st Gen) White Stylus for iPad Pro, iPad, iPad Air Bluetooth
Apple Pencil Pro White Stylus for iPad Pro (M4) & iPad Air (M2)
Apple Pencil Pro Compatible Stylus for iPad USB-C with Power Display–1st/2nd Gen
