The specular of the PBR material used for my avatar does not appear in the camera.
You can see the problem with the green car fixed in the world by the avatar gimmick in this image.
In the normal view (left side), the specular reflected light gives a whitish highlight, while in the camera (right side) it is darker.
I have seen that problem with Filamented shader(https://gitlab.com/s-ilent/filamented) and Candy Paint Shader(https://booth.pm/ja/items/4641365), but it is probably the same with Unity Standard Shader.
As for the PBR shaders used on other people's avatars, the specular reflected light was rendered in-camera without any problems. The problem only occurs with your own avatar.
I also tried switching to selfie mode and changing the graphic settings, but the problem was not solved.
To reproduce the problem, simply use PBR shaders on any part of the avatar and check through the camera. Also, the world side must have successfully placed reflection probes.