There are different versions for interior and exterior use, using different types of glue. At least OSB/0 and OSB/1 can be used for internal applications and are considered safe. Not that I would trust a landlord doing this to select the correct board type, especially since the safe variants might have some issues with the humidity exposure in a kitchen.
But there still are many cases for using OSB indoors, e.g. behind drywall to give it some more strength (instead of more expensive plywood). Wouldn’t want to leave it exposed in a kitchen though, it’ll get messy if it’s not properly treated, and in the picture it doesn’t seem to be.
You select the active hob and set the desired timer. Usually the timer is either limited to a single hob at once, in more premium alternatives you might be able to set one for each hob individually.
I’ve only ever seen this in separate cooktops though, not in stoves.