Jude Bellingham was an advantage for Real Madrid in this match. While Real Madrid was about to lose this important match against Barcelona with a 1-0 result, Jude Bellingham changed everything. I think he has done everything he needed to do and even more. I think Ancelotti can even use Jude Bellingham as a striker if he can score goals like this for his team.
When Gundogan scored for Barcelona, it was still in minute 6'. The match was very far from the end, so you can't say Real Madrid was about to lose. But it is true that Bellingham became a special player for Real Madrid. He made a difference on the match, scoring 2 goals to change the situation. When people think Barcelona seems to have a bigger chance to get points, Bellingham turned the situation around for the winning of Real Madrid. I'm not really surprised with this, I know Bellingham in his best form now. He almost scored goals in any match and become a productive player in Real Madrid. I can't imagine if Real Madrid has no player like Bellingham in their squad, they probably get difficulty to score during this season.