During group stage, usually there will be three matches occurring per day. During Qatar 2022, most of the matches were held during the evening, because of weather conditions. However in the next edition, FIFA may spread out the matches, and at least some of the matches may be held during morning. And this will enable fans in Asia-Pacific to watch them live once they are back from their study/work. BTW, US-Canada comprise of several time zones and there is a 3 hour difference between Eastern time and Pacific time within the US (fortunately they haven't scheduled any matches in Alaska and Hawaii).
European Times vs Asian Times, or American Times vs Australian Times, etc.
There's always going to be a match at 4am for someone in the world
This means that when you make it on the east, it is good for east but bad for west, when you make it further west, then it is bad for east. You have to just realize that one way or another, you are going to make some parts of the world not watch it at ideal time zone, that's just the reality. But they may make it at proper hours to get it at least to a decent time.
There are many factors to check before letting a country host the world cup like the sports facilities they have and the rules they have in their country or the interest the people have in football in that country, I think the three hosts for this world cup in 2026 have a good situation and the problem is the timezone for non-American people to watch the world cup games, however, I think if someone likes to watch the games it doesn't matter for them even if the games are in midnight.