My Site looks normal on the 'Sites' page preview box. But When I go the site on a browser it looks like it's missing the css or something.

I'm a complete novice. Why doesn't my site look like how I designed it in divi? When I searched what might be the problem, everyone says it could be a caching issue. And there's instructions on how to clear it. It Divi 4 though. Divi 5 apparently clears cache automatically. Or so that's how I understand it on their website. Please help. Thank you.