An iPhone can't bridge a wifi network. So you need something like a travel router to share a wifi connection.
They're suggesting just running off your data plan which works for domestic travel (at least to urban areas with good cell service) and can work for international if you go through getting a data eSim.
alt Hacker News
They're suggesting just running off your data plan which works for domestic travel (at least to urban areas with good cell service) and can work for international if you go through getting a data eSim.