The scammers earn affiliate money for every survey completed. You never get a password. Worse, if you entered your phone number or email, you will now receive spam or subscription traps that charge your phone bill.
The most effective way to see your existing password is through your device's built-in security tools. On iPhone/iOS and scroll down to Authenticate with Face ID, Touch ID, or your passcode. Use the search bar to look for "Roblox." Tap the entry to reveal the username and password. On Android Autofill with Google Google Password Manager Password Revealer Roblox