No I don't think so because when you talk about football it depends on the country's priority if they are interested in investing in football or not there are lot of poor countries even in Europe that are doing well in sports because they have given priority to sports.
Not all countries in Asia is poor what you will say is that they have not invested well in sport that is why football in Asia is not as developed as that of European countries and off recent I think that Asian countries like China has made significant improvements in terms of investment in sport using football as an example
Almost all countries give priority to sports. But there are some countries whose economic condition is bad, they cannot spend the same amount of money on sports as all the other countries. If there is corruption in the management of a country, then that country will never be able to do anything good in sports. Because whenever a good player gets a chance in the national team, he will be called up from the team due to many problems. An incompetent person will be called up in his place. If corruption can be removed from the middle of the game, then maybe every country will play very well.
Yeah you are right, some countries that are not doing well when it comes to sport especially football is because of corrupt system, we all know that kylian mbappe is original country or root is Cameron, I heard a story that when he first started his career he went to his country Cameron so he can be listed in there country national team and instead of trying to test him and find out if his good enough to be in the team they asked him to pay some money as a form of bribe to them however kylian mbappe's father refused and he was very disappointed at them and that was how he went back to France and then joined there national team.
Some countries has good players but because of bad leaders who is in control of the team they push away the talented footballers and then bring in those once that can give them money, just like you said if corruption can go away from our sport a lot of countries will do very well.
It is true that not all country have the same amount of money to invest into sport but they can at least invest the little they can afford.