Cam I2C Mux on Jetson Xavier NX in Device Tree

Hi Jerry

thanks for you answer.
Regarding the file you referred me too.
I saw a similar solution in this post: Using 6 Raspberry Pi cameras with Jetson Xavier NX

As of my understanding the muxing of the I2C is “written by hand” both in the post and in the tegra194-p2822-0000-camera-e3333-a00.dtsi file and the post I linked.
Yet the tegra194-camer-jakku-rbpcv2-imx219.dtsi file seem to use a block called cam_i2cmux which I assumed to be a pre implemented muxer. Is my understanding of this wrong? Why can I not use the pre implemented muxer to solve this problem?