Adding IMU mostly and ICM42688-P's FSYNC input is connected to IMX585 XVS signal so you can align both IMX585 frame and IMU data.
IMU is powered via 1.8V IO LDO so it will power down also if camera is not used, technically you can put it under 3.3V FPC from 22pin FPC connector like the TMP117 but I don't want to add additional level shifter on the XVS signal so I've decided to go with 1.8V IO rail.