The France defender spoke after the national team's first training session at Clairefontaine ahead of their upcoming Nations League fixtures, with Mbappé's reaction to the individual award becoming one of the subjects discussed.
Mbappé had been widely expected to challenge for the prize, but was ultimately overlooked. Konaté believes the disappointment was difficult for a player with such a competitive mentality, although he says his team-mate quickly returned his attention to football.
"Kylian has a fantastic attitude, as we've seen in the last few matches, in which he has been decisive," Konaté said.
"He is very important for us in Madrid. He is a competitor, so of course not winning the Ballon d'Or when he deserved it by far is difficult, but the following day he was already fully focused in training.
"I hope he is in top form next year to lift the award."
Konaté's comments suggest that Mbappé has not allowed the result to affect his performances or his commitment to Real Madrid. The forward has continued to make an impact on the pitch, and his team-mate believes his response has demonstrated the mentality required to move beyond the disappointment.
The defender also addressed his own physical and mental condition after a difficult previous campaign, explaining that he does not regard his recent performances as a gradual return to form.
Konaté insists he has been feeling strong since the beginning of the current season, having worked through a period in which personal tragedies made football particularly difficult.
His father died, while the death of former Liverpool team-mate Diogo Jota in a road accident, which also claimed the life of Jota's brother André Silva, had a further emotional impact.
The defender acknowledged that the criticism he received last season had not always taken those personal circumstances into account.
"I'm not improving, and that's been the case since the beginning of the season," he said.
"All the criticism last year, even though the personal circumstances outside football were not always mentioned, demonstrates how mentally strong I am."
Konaté's comments offer an insight into how he has approached the current campaign after an emotionally demanding period. Rather than describing himself as a player only now rediscovering his best level, he believes he has been ready from the outset.
The French international also spoke about the potential of Paris Saint-Germain forward Désiré Doué, the previous Golden Boy winner, who has continued to attract attention for his performances.
Konaté was particularly impressed by the work Doué contributes away from the moments that attract the most attention.
"I'm not impressed by Désiré, but the invisible work he does is simply exceptional," he said.
"What he does is impressive. I think he still has a long way to go before reaching his maximum potential."
The comments reflect the regard in which Doué is held by his fellow professionals, with Konaté highlighting the less visible aspects of his game rather than focusing solely on his technical ability or attacking output.
For France, the international break provides an opportunity to bring together a group of players who are also competing at the highest level of European club football.
Konaté's words offered reassurance about Mbappé's state of mind while also providing an update on his own recovery from a challenging year.
Both players will be important to France's ambitions, and Konaté's assessment suggests that the disappointment of the Ballon d'Or result has not disrupted Mbappé's determination to reach the top of the game again.