You are not alone. The IRS still has several million of these left to process from the COVID shutdown. Per the IRS, do not file a second return. See:
Haven't Received Your 2019 Tax Refund Yet? You're Not Alone (msn.com)
Refunds | Internal Revenue Service (irs.gov)
Note: While the IRS says it is processing paper returns First In First Out, the same is not true for efiled ones.
