Yes, but that only applies to the CM4. On a Raspberry Pi 4, I had these lines in my /boot/firmware/config.txt
camera_auto_detect=0
dtoverlay=camera-mux-4port,cam0-imx708,cam1-imx708,cam2-imx708,cam3-imx708
and all four cameras were found. The problem I had in Multi-Camera Adapter Board + 4x Raspberry Pi v3 (wide) cameras = No cameras available was that I’d put the multiplexer - Raspberry Pi cable in the wrong way up. It goes in the other way up from the camera cables. There’s a picture in there how it should look.
Since this topic was marked “solved” you’d be better off asking your own new question if you continue to have problems. Arducam staff may not monitor solved questions.