Your stimulus check could still be in the mail. 2 ways you can track it through USPS - CNET

If your payment made the cutoff, a postal service tool can help you to keep tabs on your stimulus check right to your mailbox, so you don't accidentally throw it away.

Your stimulus check could still be in the mail. 2 ways you can track it through USPS     - CNET
If your payment made the cutoff, a postal service tool can help you to keep tabs on your stimulus check right to your mailbox, so you don't accidentally throw it away.