Mailed 2020 Tax Return in March 2024, Still not showing as Accepted

Just as title says, I mailed my 2020 Tax return on April 22, certified, and signature required. The IRS received the return within days as noted by the USPS  but oddly enough, the little card that shows they received it was dated for about 2 weeks later.. 

 

With thay said, I have been looking to see if they shoa they have accepted the return and it is still showing no return has been received for 2020. Is this normal for mailes returns? It is boa just over 4 weeks since mailed. I guess I'm just used to being accepted withinnhours/days when electronic filing.

 

Any thoughts?