Select the Settings gear icon in the to right > Company Settings.
On the Company Settings tab, scroll to the bottom of the page and find the mobile app category. Check the box to give Drivers access to ALL Assets on the mobile app > Save.
If enabled, your Drivers will be able to complete inspections on any Asset. When a new Asset is created, Drivers will have access to the Asset by default. Drivers will have 3 tabs on the Assets Select screen on the mobile app:
Recent (Their 3 most recently inspected Assets)
My Assets (All the Assets from their Team + any Assets they have been individually assigned)
All Assets (All Assets of the companies)