According to UEFA's tournament requirements for hosting Euros games, Croke Park could well be ruled out as a potential venue.
European football's governing body state in both their Euro 2020 and Euro 2024 requirements that 'no provisional or temporary seating installations will be permitted' among stadia.
The idea that the GAA would make permanent alterations to Croker's historic Hill 16 to host a handful of games over a month-long soccer tournament seems laughable so based off that rule, GAA HQ is a non-runner unless that criteria is softened for the 2028 edition.