Is it a bad thing that I have not received my refund yet or heard anything about my refund?

You're likely on a review, like the thousands of others of us who are posting, if you go down a few topics, you'll find more info on the review crap. And to find out if your on that review, either call the IRS, or make a account on the IRS website, and pull up your 2019 tax transcript, you'll see some codes with phrases at the bottom of the page

@alcarazanna If it has been more than 3 weeks since you've filed your return, you can reach out to the IRS for more information concerning your refund. Here's how you can reach them: What if my IRS refund is taking longer than 21 days?