The answer is no. maybe for the African continent, with the addition of the quota of world cup participants it can encourage them to further increase their football level. but for asia, especially asean, i doubt it. it is still too early for asean countries to participate in competing in the world cup championship. So, will the addition of the team to 48 entrants increase the level of the world cup. I say again, the answer is no. I don't know yet how the mechanism will be implemented in the 2026 world cup, and how this system will be implemented. So, I can't assume too much.
However it seems, there will be more weak teams compared to strong teams. what is certain, the 2026 world cup will not be better and more competitive as before. in the end, the participants who will enter the higher rounds are the countries that are always the favourites.
I will go a little further in your answer.
The African continent is one that urgently needs more places in the world cup, the current 5 places does not match what the teams have evolved, just think that in the last cup some strong teams did not participate, like Nigeria and Egypt.
Morocco, from Africa, came in 4th place, an excellent result and with merits.
Speaking of Asia, from 3.5 to 8.5 places also got better. I disagree with you a little bit about the level of the Asian teams.
Look at Saudi Arabia, who beat Argentina and showed a good level of soccer in the other matches. They didn't qualify, but they played well.
South Korea, played very well, disqualified against Brazil, but they played well too.
Japan, qualified first in a group that had Spain, Germany, and Costa Rica, and narrowly missed qualifying for the quarterfinals because they played against Croatia, 3rd place.
Iran and Australia in my opinion also played well, you can see that they have evolved over the years.
Only the Qatar team that I thought was weak, but it was their first participation in a World Cup, it was easy to see that they were nervous, but in the second and third game they managed to play a little better.
And one last thing I would like to say is that maybe what is missing for the national teams to evolve is to participate in the World Cup, to play against other stronger teams, with more pressure, with a lot of people watching.
This can help raise the level of soccer, so it can be a very good factor that will help develop soccer even more in Asia, Africa, Oceania, and Central America.