Hawaii isn't considered international, from the perspective of the US - it's domestic. Notice that there also is not a trip to Alaska shown, though he did visit Alaska. (And, trips in the mainland US are not shown either.)

Right, thanks! My US geography is a little rusty.

Hawaii is part of the United States...

And to be clear, that website is a weird parody. It's not an official anything.

What's a weird parody about it? That's different from being unofficial.

The URL at least is really dodgy, looks like a phishing scam. At a quick glance the gov1 can be mistaken for gov/ and lead people to think it's the official White House website. I'd think twice before clicking through.

It says "Parody of whitehouse.gov" on the main page.

Also this: https://whitehouse.gov1.info/launch/launch.html