The iPad landscape width would be the LG breakpoint. So styling at the top breakpoint is served to the iPad in landscape.
I would suggest forgetting about devices and think more in terms of screen dimensions.
So an iPad landscape would be served the same design as a laptop as they have screen width dimensions that fit within the 1200 > 992px screen size.
I explained a few things in your original post here.
Regarding the iPad portrait in preview, take care to check the viewport width is still 768px as the viewports in preview mode can be resized, which would mean they no longer reflect the device screen size.