Brazil and Argentina will very easily qualify for the world cup. because the contestants in the CONMEBOL zone are only 10 participants. and 5 of them will qualify. and a fairly balanced opponent for Argentina and Brazil is only Uruguay. in terms of squad material Uruguay can be competitive with Argentina and Brazil, the other quality is too far compared to Argentina or Brazil.
The rules changed after FIFA announced the 48 teams World Cup in 2026
Now the CONMEBOL qualifiers will have 6 teams qualifying directly and the 7th place team will try to classify in a play-off match (probably against a team from Oceania, and usually teams from South America win that the match and the spot)
So the chances are even greater, only 3 teams will be out of 2026 WC