lmod not working for zsh on knightly

I noticed that ml is missing in the knightly instance. Initially thought it's because lmod is not enabled on the instance so was focused on enable_lmod role. Now that the enable_lmod role is working, then realize that lmod is not even installed on the node.

╭─ louistw    ood-knightly    ~                                                            3 ↵
╰─ ml
zsh: command not found: ml
╭─ louistw    ood-knightly    ~                                                          127 ↵
╰─ module
zsh: command not found: module