Does Cash App offer its own cards?

Yes. Once you sign up for an account, you can request a free debit card.
Cash App doesn’t offer credit cards.

Is the money sent via Cash App protected against loss, fraud and theft?

The Cash App account and debit card would fall under the new prepaid card regulations, which took effect April 1, says Tetreault.
That means if you have unauthorized charges and report them within two days, your losses are limited to $50.
You can also temporarily disable the card if you’ve lost it, according to the company’s site.
But if you actually authorize sending money to someone (to the wrong person, in the wrong amount or to a recipient for merchandise that isn’t as promised), you’re not protected, says Tetreault.