When an App scan is reported and Non-native (as indicated by an 🔶), that means the app file provided does not have native compatibility with Apple Silicon, and we have not had any reports of native versions of the app yet. This doesn't necessarily mean the app won't work, it just means it hasn't been updated for Apple Silicon specifically and can't say for certain that it will definitely work. Most apps reported as Non-native will usually still work under Rosetta 2 Translation with similar performance to the app's experience under an Intel-based Mac. You can try getting the latest version from the developer's the download page scan that. You can also request a manual review to determine the current status of the app on Rosetta 2.
Currently, some random apps will cause the scan to hang indefinitely. If this happens, you can try scanning a few apps at a time or one at a time until it hangs again and skip scanning that app for now.
Currently, Rosetta 2 is a proprietary Apple software that is only available on macOS on Apple Silicon devices. This means there isn't any way to test Rosetta 2 compatibility with an app without a physical Apple Silicon device, and so you definitely can't test that with just a website alone... for now... Feel free to signup for email updates.
Most apps will work with Rosetta 2 translation well, but it's not a perfect technology. Some apps will have various small issues and graphical bugs but will work well enough, a few apps will fail to launch entirely, and some apps will run with virtually no problems and perform even faster than on an equivalent Intel-based Mac. For now, the best way to determine how well an app will run under Rosetta 2 is by human review.