Update Modern POS to latest version in D365fo

 

Refer below link : - 

Configure, install, and activate Modern POS (MPOS) - Commerce | Dynamics 365 | Microsoft Docs

Device activation of a customized Modern POS - Commerce | Dynamics 365 | Microsoft Docs

Click check for package update

To update peripheral : - 

Refer below link - https://www.youtube.com/watch?v=ZSdH57w02oc