Hulu Live TV is available for Android TV (as well as mobile).

If your Mi Box S doesn't show it as a compatible app, it's because of the OS version or some other requirement that Hulu has placed on the app. If it's a legitimate reason, sideloading the apk isn't going to work, but if you can find a copy of the apk, you could try that.

The only other way is to "spoof" your build.prop file to report a different OS version, model number, memory size, processor, or whatever other factor is preventing you from loading it. Actually running it is another story though.

Of course that requires rooting your box and that's not a trivial act. Then you have to know how to edit build.prop. You'll also probably screw up Netflix if you do that.

Maybe there's an internet browser that can change user agent. If so, change it to windows or macos and just watch hulu from that browser

If in diff country try a vpn of your home location

Did you try it on your mobile? If it works then its prob a Os version issue like someone mentioned .

Prob the box got an issue could b version number or maybe it comes as china location im just asuming so the best thing to do is for you to try and create a trial account on the box and see if it works.

UPDATE:

I sideloded Hulu and this is what it says :

Your current zip code and location doesn’t match
your home .

It knows I’m not at home...

This is my friends Hulu live , he lives in New Jersey I’m in California