Zoom Event Registration Question

We are hosting an event with Zoom Sessions and would like our attendees to register beforehand so we can have an idea of how many people plan to join. However, we want them to be able to join directly without needing to sign into Zoom or use an OTP. I understand I can pre-register attendees and that will remove the authentication/sign in requirement, but it doesn't seem to solve the issue of knowing how many people on our list actually plan to attend. Is there a way to do this?