No mail for the last 3 days?

As the title says. I checked my cameras and the mailman has been in our neighborhood and walking across our lawn but we haven’t gotten anything since Tuesday. It’s very odd especially since it’s not the holiday week anymore. I’m not sure what to do or who to ask? Is there an online portal or something I can check? Our mailbox is within clear view, the weather has been mild all week and our dog is never outside when the mail is delivered so none of these would be an issue??