The World Cup is one of the hardest to fix (from editor point of view), mainly because of the knock on effect on the qualifiers.
Question, did you log a bug for this?
With regard to the stadiums, I expect them not the use the real assigned stadiums, but I am not sure if that even happened in previous versions? Anyway, I see the issue, I would say stadium 0 is used for the Qatar games and stadium 3 or 4 for the other games. Maybe using stadium 0 in the other pools as well.
Whether you can duplicate, depends on whether the 2022 version is a separate WC or in the same 'template' and only differs because offset dates are used.