Hello, I have Raspberry Pi 4 Model B with 4GB RAM running Raspbian OS version 10 (buster)

pi@raspberrypi:~ $ uname -a
Linux raspberrypi 5.10.17-v7l+ #1403 SMP Mon Feb 22 11:33:35 GMT 2021 armv7l GNU/Linux

pi@raspberrypi:~ $ lsb_release -a
No LSB modules are available.
Distributor ID: Raspbian
Description:    Raspbian GNU/Linux 10 (buster)
Release:    10
Codename:   buster

I'm trying to build a robot doing SLAM and I have a 3D camera (Orbbec Astra Pro) that I want to use on the raspberry. I follow this instructions to install the camera's drivers. It says the package supports ROS Kinetic and Melodic. So firstly I install ROS Melodic by following the instructions here for Raspberry running Raspbian Buster.

pi@raspberrypi:~ $ roscore
... logging to /home/pi/.ros/log/1ca7f728-86f3-11eb-8c40-dca632b73e4a/roslaunch-raspberrypi-1335.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://raspberrypi:38761/
ros_comm version 1.14.10


SUMMARY
========

PARAMETERS
 * /rosdistro: melodic
 * /rosversion: 1.14.10

When I'm trying to run this:

sudo apt install ros-$ROS_DISTRO-rgbd-launch ros-$ROS_DISTRO-libuvc ros-$ROS_DISTRO-libuvc-camera ros-$ROS_DISTRO-libuvc-ros

I'm always getting that it unable to find the packages:

pi@raspberrypi:~ $ sudo apt install ros-$ROS_DISTRO-rgbd-launch ros-$ROS_DISTRO-libuvc ros-$ROS_DISTRO-libuvc-camera ros-$ROS_DISTRO-libuvc-ros
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package ros-melodic-rgbd-launch
E: Unable to locate package ros-melodic-libuvc
E: Unable to locate package ros-melodic-libuvc-camera
E: Unable to locate package ros-melodic-libuvc-ros

I've tried to to apt get update, I've tried to install them manually by doing (according to section 4.2 of this instructions):

rosinstall_generator rgbd-launch libuvc libuvc-camera libuvc-ros --rosdistro melodic --deps --wet-only --tar > melodic-custom_ros.rosinstall

or different variation of that. also tried to install from source but didn't find a good instructions to do it. I'm really lost and appreciate any help. Thanks