If you have add path to .zshrc file and the issue persist. Ensure ~/.zprofile should always be sourced by zsh.

If it's not you might want to do it yourself in your .zshrc file.

Add: export PATH="$HOME/.poetry/bin:$PATH" to ~/.zprofile by doing the following

1. type open ~/.zprofile in terminal
2. add export PATH="$HOME/.poetry/bin:$PATH" to the opened .zprofile file
3. Save it CMD+s
4. In terminal, type source ~/.zprofile to refresh

Now try poetry --version on your terminal.