How to find a Facebook Marketplace listing date

Every now and then I come across a Facebook Marketplace listing where the listing date is not shown on both the desktop website and Android app. There is no "Listed 8 hours ago" type message on the listing page like there usual is, or in search results.

The only way I found to find the listing date is to login to the mobile version of the Facebook website either by opening it on a phone or simulating access as a mobile device on a desktop browser.

To do this on a desktop, open the Facebook listing page in your browser. These instructions work for Chrome or Edge. Here's the original page, with just a "Listed in..." location message.



Press F12 to open developer tools and then press the button to toggle the device toolbar on.



You can then choose a device such as "iPhone 12 Pro" from the list in the toolbar.



Then reload or refresh the page. Finally you can see the approximate listing date.