Simply put, the answer is no
In the world of Selenium, there is no built-in feature to display anything whatsoever. Instead, it serves as a tool to connect with other systems, leaving you dependent on those systems to showcase your "snack bar".
If you wish to showcase something in a web browser, your only option would be to insert your own code for creating the snack bar. However, this approach would compromise the integrity of your test, as you'd be testing not just the site but also how it interacts with your custom code.
You could explore leveraging the programming language used for writing the testing scripts to display content. For example, in Java, one commonly uses System.out.println() to output information in the console. You might even develop a separate application that runs alongside Selenium to present an OS-specific message box. But even then, there's a high chance of disrupting the automation process.
Therefore, the critical question remains: Why do you feel the need to showcase something?
Typically, automation aims to execute a series of steps without human intervention, where there's no one monitoring the process in real-time. So who exactly is the intended audience for this snack bar?
The most plausible reason is for debugging purposes. If that's the case, incorporating additional code to display visuals is the least advisable course of action. By doing so, you're exacerbating the existing problem and potentially distorting the results. If you're troubleshooting, opt for external logging tools like System.out.println() or its equivalent in your code, steering clear of any impact on the screen or browser interface.