After you file

Sent my 2019 paper tax return certified mail 1 June 2020; was delivered 5 June 2020.  Can't get status from IRS using the online tool, nor by phone.  No option to talk to an agent.  I understand IRS is dealing with impacts such as COVID-19, but this is an information vacuum.  How do I find out if IRS at least processed and accepted my return, or even if they have an estimated date by which that will happen??