It works!
I had to update cmake with the following commands and the build lyrealsense
#update cmake
sudo apt-get install curl
sudo apt-get install libssl-dev libcurl4-openssl-dev #curl dependencies
wget http://www.cmake.org/files/v3.13/cmake-3.13.0.tar.gz
tar xpvf cmake-3.13.0.tar.gz cmake-3.13.0/
cd cmake-3.13.0/
./bootstrap --system-curl
make -j6
echo 'export PATH=/home/nvidia/cmake-3.13.0/bin/:$PATH' >> ~/.bashrc #replace /home/nvidia with your instalation directory
source ~/.bashrc
#copy pyrealsense2 packages outside the folder
sudo cp -r /usr/lib/python3/dist-packages/pyrealsense2/* /usr/lib/python3/dist-packages/
#build Librealsense
wget https://github.com/IntelRealSense/librealsense/archive/v2.38.0.tar.gz && tar -xvf v2.38.0.tar.gz && cd librealsense-2.38.0/ && mkdir build && cd build && cmake ../ -DFORCE_RSUSB_BACKEND=true -DBUILD_PYTHON_BINDINGS=true -DPYTHON_EXECUTABLE=/usr/bin/python3 -DCMAKE_BUILD_TYPE=release -DBUILD_EXAMPLES=true -DBUILD_WITH_CUDA=true -DBUILD_GRAPHICAL_EXAMPLES=true && make -j6 && sudo make install
After this you should be able to execute the examples with python3
Thank you Andrey1984