How to enable co-host under account settings

Hi there,

 I want to enable co-host features and I read the article below.  However, when I go to the setting page, I don't even see that there is a toggle option for "co-host".  I understand you need to have a pro account to enable co-host, but I don't even see that option available there.  Why?

https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0066640

Mr. Wong