You can only see "Discovery" posts (public ones) if you have posted your own BeReal for that day.

Is a Free BeReal Profile Viewer Possible? Everything You Need to Know

When searching for a "free profile viewer," you will likely encounter third-party websites or open-source projects. While some are legitimate developer tools, many others are potential security threats.

Even if you find a user's profile, you cannot see their daily posts or history unless you are mutual friends or they have posted to the "Friends of Friends" feed. Third-Party "BeReal Viewers": Help or Hazard?

All accounts are private when created, meaning only approved friends can see your posts.

If you want to view more content without resorting to sketchy third-party apps, use the app’s built-in features: