zsh doesn't find workon from virtualenvwrapper

Question

hi i have installed virtualenv python library to manage my env doing all the setup but when i use the following command to open my env that happen

francesco@AirdiFrancesco ~ % workon          
zsh: command not found: workon

but when i run this code before workon don't give me problems

export WORKON_HOME=~/Envs
VIRTUALENVWRAPPER_PYTHON=$(which python3)
source /opt/homebrew/bin/virtualenvwrapper.sh

now i have tried to add this three line to my ~/zshch file but doesn't work. where i need to put this code in my bash?