But it says there in Publishing AppsCreating a private app allows users on your account to add your app without releasing it publicly. I have mentioned the app should be able to used by users outside of my account and the app should be unlisted in marketplace.
Yes, it is possible to create Marketplace App that is publicly available. To do so, you will want to creat create a Zoom Marketplace OAuth app that can be shared outside your account. Please see this helpful developer forum post for more details on this topic :