I have bought an Apple Watch SE with cellular for my kid, and I have enabled a Telus standalone plan for this watch so I can call my kid. So I was using the Family Setup to setup the watch.

Most of the basic functions are working well, but the problem is the apps installed on the Apple Watch is limited. I cannot install any apps to the watch from my iPhone, not even able to change the watch face from my iPhone. The apps view from my iPhone for this watch is much shorter than my own watch. Is there any way to resolve this issue? Thanks.