Use Lenovo Vantage to update drivers.
This option is not available in iphone, android.
This is not available in chromebook.
Yes, you can use phone as a hotspot.
When docking to an external monitor
search for “lid” in the start menu → choose “Change what closing the lid does”
or go to “Control Panel\Hardware and Sound\Power Options\System Settings”
Power and sleep buttons and lid settings -> When I close the lid -> On battery = Do nothing -> Plugged in = Do nothing