Until now, Giroud has done a great work and didn't make his team feel Benzema's absence much. Giroud has scored 4 goals so far and he is one of the candidates for Golden Boot as well. He wasn't very effective in the latest match maybe but he will be expected to play better in the finale.
According to media reports, Deschamps was asked about this matter, but Deschamps passed without answering this question. I think Deschamps may have expected sacrifices from him and was disappointed because his expectation was not fulfilled. I think he had an emotional reaction because he was disappointed. Actually, I expected a better explanation from him.
By the way, Karim Benzema's name is on the list given to FIFA by France. If Deschamps gives him a chance, he can play in this match. In fact, if France wins the World Cup, Benzema will even get a medal for being on the list. Indeed, this is an unusual event.