About England, they are considered as a weaker team in the final match but it's wrong to say they are an underdog. They are one of most favorite teams to win Euro 2024 since the beginning. Underdog is matched for teams like Georgia, Turkey or Switzerland, not for England.
In the final match, England is the underdog, even in the eyes of its fans, due to its tragic performance throughout the tournament and because everyone is convinced of Spain's right to win due to the efficiency it has shown. Perhaps my position is not very objective since I am a fan of Spain in the finals and I was even in its previous matches observing England’s performance, which was below the required level compared to the strength of the English team and the stars in its ranks.
With the exception of England's performance, which I still consider below what was required, it was a wonderful tournament in which we witnessed good performance by many teams, at the same time in which the performance of major teams such as France and England declined.
However i squarely put the blame on Gareth Southgate, the reason is that, the English team in it's antecedent during the competition are good at "coming backs" they always want to be scored before they are triggered to come out and force the attack on their opponents.
If you watch that game closely, you will notice that immediately after England succeeded in scoring to make the game 1-1 equaliser, they went back and relaxed, instead of maintaining the momentum so they could score more goals. So for me Southgate would have worked on the mentality of his team for them to always force the attack instead of wanting to play defensive.