Apple doesn't make regional variants of the phone, so all models have the technology built-in, even if it's disabled by default. Android phones outside of Japan lack Suica support.

And Pixel phones have the tech, but you need to flash a Japanese ROM to be able to use it.

Ahh interesting. I wonder why they (non-Apple) did that?

Suica uses the Sony FeliCa NFC standard (which predates the international NFC standards) which they charge a license fee per device for.

Apple has the margins to just pay the license fee for every iPhone, Android makers try to keep their costs down more.

There's a chip required for it that they cheaped out on.