This new platform is different from the old one. Installation techniques are different.
First, you’ll need to run the following commands in a terminal
conda init
then reload the terminal and run
python -m ipykernel install --user --name 'python-user-env' --display-name "User Python"
It will then be possible to install packages as a user.
pip install mypackage
Next, you’ll need to launch the Notebook using the User Python
kernel.
Don’t hesitate to restart the kernel to take your changes into account.
In the menu: Kernel -> Restart Kernel