I bought an Asus Chromebook recently and one of the intentions was to pair it to my iPhone to get internet connectivity while commuting to work. Turns out Chromebooks can't pair with phones, I have to use a wifi hotspot instead.
Just not iPhones, apparently.
Though the WiFi hotspot feature on my Android is just easier anyway.
Just use your phone's hotspot feature. The amount of time saving between using your native tethering vs Instant Tethering is negligible.