Real Madrid's forward is very strong if Bale and Hazard are not injured. They don't need Mbappe at the moment. But with Varane and Ramos leaving, their defense has become very weak. This gap they will not be able to fill this season. Maybe they have to play defensively, otherwise the strikers have to score a lot of goals.
In my opinion, however, Real Madrid still needs another pure striker to replace Karim Benzema if he is injured or banned from playing, if Real Madrid wants to compete this season, of course, Hazard and Bale are not enough, you can see how Bale game has been inconsistent for two seasons then, so he was loaned last season to tottenham.
I agree with you, that right now Real Madrid need to fix their fragile defense and made a lot of mistakes that led to goals in the match against levante yesterday, it looks like Ramos and Varane left a big hole in the Madrid defence today.
Levante's players have attacked far fewer than Real Madrid. If we look at statistics, we can easily understand. Real Madrid has made a total of 20 shots. But Levante has done only 8. They managed to score 3 goals out of 8 shots. Real Madrid should take appropriate steps now to stabilize the defense.