Hello Marco
cellpose is now installed by default in the Python 3.9 environment.
stardist is also installed by default in the Python 3.9 environment.
The Python 3.7 and 3.9 kernels are available from Jupyter
Note that when you do module load python/3.9 on the cluster, you have access to the same python as when you use the python 3.9 kernel from JupyterLab (the same python that integrates all the libraries).