How to publish updates to the "ITSM Mobile" application from one instance to another?
Update Sets should be used to apply changes to ITSM Mobile applets to another instance. Create an Update Set in the ITSM Application scope, make your changes, and apply the Update Set just like you would any other.
Even though ITSM Mobile can be opened and edited in Studio, it cannot be published from there. Only custom applications can be published from Studio. Custom applications live in the sys_app table. Applications that you've installed, such as "ITSM Mobile", are sys_store_app applications, and these cannot be published from Studio.