No, the U3 does not have a “Find My Remote” feature.
The reason is that the feature relies on a Bluetooth connection between the remote and the phone app. Because phone operating systems often terminate background Bluetooth connections to save power, the remote cannot maintain a persistent connection. This prevents the “Find My Remote” function from working reliably, so the feature was not enabled.
While some other universal remotes offer this feature to help you locate a lost remote, it is not available on the U3. You’ll need to rely on the old-fashioned method of checking between the couch cushions.