The IRS was already behind with about 16 million 2019 returns before tax season ended for 2020. They are working on returns as quickly as possible, but many are taking months. If there was anything on your return that required a human to look at it, then it is probably part of the pile on someone's desk.
Since it is processing, you know it has been received. All you can do now is wait. If the IRS needs to get any more information from you, they will contact you.
