The IRS has just started to work through millions of mailed returns that have been piling up in trailers during the pandemic. All you can do is watch the IRS refund site to see when your return makes it to the surface and goes into processing. Sorry.
Per the IRS website IRS Operations During COVID-19: Mission-critical functions continue:
IRS operational status and alternatives
Processing Delays for Paper Tax Returns: Taxpayers should file electronically through their tax preparer, tax software provider, or IRS Free File.
We’re experiencing delays in processing paper tax returns due to limited staffing. If you already filed a paper return, we will process it in the order we received it.
Do not file a second tax return or contact the IRS about the status of your return.