Please forgive my bad English as it is not my native language.
In my case, I was able to get the reward by following the steps below:
・Change language settings from Japanese to English
・Redo the finals
My environment is PS5 so it may not be a complete answer
LIVE SAVIOUR!
I had the same issue in German but on PC!
I changed like you said ingame the text to English, restarted the Game and after the European Cup 2024 Final win it counted and was unlocked!
命の恩人！本当にありがとう ♥♥♥
Very frustrated game wasn’t properly tested for many languages. Changing language to English in game setting and replaying final resolves this issue.
