@RedRonaldo You made a mistake here when you mentioned Lacazette for two reasons. First Lacazette struggled in Europe and secondly if you look closely at his stats, Lacazette scored 10 penalties in those 28 goals, his goals/assists ratio is actually pretty close in the CL and L1. Regarding Memphis he has grown as a player, so I'm not sure about the type of conclusion we can draw while Ibrahimovic had an exceptional season that he wasn't going to replicate his previous seasons ranged between 19 and 30 goals which is where he would have been without his injury and he was at the end of his career.
And I don't even know what you are trying to do, no one suggested that both leagues where at the same level but that your argument doesn't have legs when Mbappé does it in the CL against the likes of Napoli, Bayern, United, Real Madrid, Dortmund or Liverpool. You can dismiss Ligue 1 if you want but how do you explain that Mbappé has a far better goal and assist ratio in CL than Rashford has in EL, the EL is a weaker competition in which United has always been the biggest club, yet Mbappé registered more than twice as many goals and assists?