Hello,
The review on PCMag (https://www.pcmag.com/review/359330/onyx-boox-max2) says, that Max2 has “a fabric loop to hold the included stylus. (The pen has a clip that hooks onto the loop.)”.
Other sources (like goodereader) says “Stylus has no clip, easy to lose”.Also the picture on the Onyx web page also shows no clip, nor does the picture on Amazon.
Maybe there is two versions? How to differenciate, which one is wich?