Minor nit, but the return is what you file, the refund is what you're waiting for.
And they're super far behind in processing mail-in returns. Apparently they still had millions of unprocessed returns remaining as late as October, so it's likely they still haven't processed your return, but you can check the status of it here. https://www.irs.gov/refunds
Oh yeah, I have been checking that page once a week for a month now. No dice.
I hate to call and bother them, because that just means extra work for them when they're already backed up, but at the same time, I do not want to find out that my filing has been lost in the mail.
And they're super far behind in processing mail-in returns. Apparently they still had millions of unprocessed returns remaining as late as October, so it's likely they still haven't processed your return, but you can check the status of it here. https://www.irs.gov/refunds