Open jupyterlab-app from terminal

Hi!, I just installed jupyterlab-app in ubuntu 20.04 using the dev package. I can open it from the ubuntu launcher, which works fine although the root folder is home. It appears that there is a way to open it via the command line in a terminal, using “jupyterlab-app”, but I do not have that command, is there a step I missed after the installation?

thank you,