Fix Python – How to add conda environment to jupyter lab

I’m using Jupyter Lab and I’m having trouble to add conda environment. The idea is to launch Jupyter Lab from my base environment, and then to be able to choose my other conda envs as kernels.
I installed the package nb_conda_kernels which is supposed to do just that, but it’s not working as I want. Indeed, let’s assume I create a new Conda Enviro….