Galaxy Tablet Layout Size

I am developing a tablet-only app 10 inches
and then I discovered that the Galaxy Tab s6 does not use the universal 10-inch size SCREEN LAYOUT SIZE XLARGE.
So I am wonder. How Distinguish the Galaxy Tab is 10 inches Or is this just a special case?Or is it possible to adjust the layout size?

Hello hch,
So far I could understand from your query, you’re trying to declare a specific screen size support.
If you decide that you don’t want your app to run at certain screen sizes, you can set limits for how much your screen should resize or even restrict which devices can install your app based on their screen configuration.
Please have a look into this link for more detail.

Thank you!