Can I day trade on Webull?

Sure, why not? Do you have any troubles with it? I would advise you to study some professional resources about webull options https://tradersunion.com/interesting-articles/webull-options-everything-you-need-to-know-about-webull-option-trading-to-earn-more/ and see what is happening with stocks now, then you can understand how much it is now profitable. Hope it will help you