~snip~
As far as I know, this 10-match figure was decided earlier, when FIFA was thinking about a 3 team per group format. But then they changed the format to 4-team groups and therefore the total number of matches almost doubled to 104. So I guess both Canada and Mexico will get more matches to be staged within their borders. But I have a question here. If USA is hosting more than 70% of the matches, then why Canada and Mexico are being allotted automatic qualification to the 2026 World Cup? They are not co-hosts. They are just subsidiary hosts.
I think there have been some talks that basically they are going to re design the whole thing because the 2022 world cup was actually quite interesting, so they want to keep the current format.
I'm not sure how it will end up being in the end, but hopefully they actually come up with something reasonable because there will be so many countries now.