The fact is that African and Asian football has progressed significantly in recent years, which can be seen in the examples of the success of South Korea in 2002 and Morocco last year
Japan and South Korea are teams in Asia that have experienced a lot of progress, especially Japan, not because they were able to beat Germany but being able to qualify for the knockout rounds is an achievement and Iran also a power team from Asia, this is quite surprising because the country's conditions are not so conducive, but the national team can still play in the World Cup.
Saudi Arabia is working hard to develop their league but not sure if it will directly impact their national team because as far as I can see the development only affects the popularity of their league. With the increase in the number of participants, Asia will also get an addition but I'm not sure that there will be a new team that will impress because Europe and America have always been the best in the World Cup.
Asian football, always dominated by Japan. so naturally, if Japan participates in almost every World Cup championship, the progress of Japanese football is more prominent when compared to other Asian countries. then, followed by South Korea, Iran, Arab. in fact, there are many Japanese players who play at the European league level.
now, Qatar is one to be reckoned with in the Asian Cup even though there are actually many naturalized players. however, they were able to become finalists in the 2019 Asian Cup which toppled the Japanese squad. Currently, the development of football in Qatar is better than Iran and Arab. but now, Arab countries are trying to build their football to further develop.
At the 2026 world cup, FiFA increased the quota for Asian representatives to 8 countries. To be honest, I don't know if this is a good idea or not. but after I tried to examine it, it's good for Asian countries to have new experiences in the world cup championship event. "other than the countries we list in this post". maybe, that way the development of football in the Asian continent can be more developed and more evenly distributed. yes, i hope so.