FIFA's policy on stadium capacity
FIFA requires the host of a World Cup Final to be a stadium with the
capacity of at least 80,000 seats. Under those requirements, just MetLife Stadium, AT&T Stadium and Mexico City's Estadio Azteca are large enough.
Reporting did suggest that Dallas and Arlington made a serious effort to be the host. Jerry Jones and Co. hosted FIFA president Gianni Infantino on multiple occasions. The city was openly optimistic about its chances. Yet, FIFA wanted the global recognition of New York (though the stadium is in New Jersey) and the preferable time zone over holding a final in Texas.
Los Angeles did make a pitch that its 70,000-seat capacity would still present plenty of revenue opportunities through the stadium's many hospitality areas. But
according to The Athletic, FIFA still preferred the larger capacity.
Los Angeles had once been considered a direct rival to New Jersey for the World Cup final, with FIFA officials struggling to resist the lure of the global recognition and awareness of L.A. and New York. L.A. officials, meanwhile, made no secret that they viewed the two showpiece events of the tournament as the first match in the United States and the final.
Some at FIFA were under the impression that there may be more revenue to be had through the higher attendances in New Jersey or Dallas, but LA officials always insisted they were both competitive and available to host the final if selected to do so. The timezone also counted against LA's chances, with major European broadcasting contracts also a factor.