Mbappe's style of play for the club is very different from that of Mbappe for France. I think he played for the club to increase his goal tally. I also saw various negative news about him by players in his team. However, when Mbappe plays for France, he plays with enough dedication to his team. If i talk about ronaldo the I think the rest of his team members don't consider Ronaldo as such an important player. In this case, if we talk about Messi, then everyone in his team gives Messi a lot of importance and respect. They admit that they play only for Messi. Considering that aspect, Ronaldo has contributed a lot to his team, but his team has not evaluated him in that way.
The style of play is not different, the thing is that in club level games, the selected players from the world are formed, so the club team looks much stronger than the national team of a country. The reason why Mbappe performs well for the club is because of the strong teamwork where the best players from different countries are their and they all perform well.
There are only a few talented players in a country's national team and their performance is not the same in every match. The France team does not have any good forwards other than Kylian Mbappe, so if he tries to score a goal, there is no talented player to assist him. It is through mutual cooperation that a player is able to score a goal and if the form of his teammates is poor, the team cannot do well.