The UEFA website mentions: "Once the final draw has taken place on 2 December 2023, fans will be able to apply for tickets for any team in the UEFA EURO 2024 Ticket Portal. Supporting a specific national football association? Click on the flags below to see how the sales of the respective national football association works."
The way I interpret this is that you can:
1) apply for tickets via a national football association
2) apply for tickets for any match you want FCFS
Or is it not like that?