Zoom's announcement regarding password protection: https://support.zoom.us/hc/en-us/articles/360041408732-April-2020-Setting-updates-for-free-accounts-and-single-Pro-users

With Zoom now turning on meeting passwords by default, you can find your meeting password in your meeting details.

This should not affect instant meetings using your personal meeting URL. Please reach out to us if you have issues. 

If you are creating a meeting, you can find the setting for the meeting password when create your meeting here:

In addition, your cloud recordings may become password protected, if so, please see this guide.