There is only a remote chance that Brazil will miss qualification. Because from this time onwards CONMEBOL is being allotted a total of 6.5 spots in the world cup. So out of 10 teams participating in the qualifiers, 6 will get direct qualification based on their standing in points table, while the 7th ranked team need to take part in Inter-confederation play-offs. At this point, Brazil is at 6th position. And I am sure that they will improve their position once the tournament restarts by September 2024. But there is no room for complacency. All of the participating teams are very strong in CONMEBOL.
I think Brazil is capable of performing better compared to what they have been doing. I also think that so far they have been facing pretty decent opponents as well. No, I do not think Brazil is going to miss the World Cup. But you never know. Something crazy might happen. People also did not expect Italy to miss the World Cup. But they did. I am not saying that Brazil is going to miss the World Cup. But there is definitely a chance for back to happen. Even though the chance is very small. And I absolutely agree with you that there is no chance for complacency.
I don't have information about the last World Cup Brazil had but as far as I saw in the past World Cup games, Brazil never missed a World Cup and even if they were in a bad situation but Brazil played in the World Cup and even in the next world were going to see in the 226 I think Brazil will not miss this tournament because even in the worst form of Brazil, they can still have a great chance to be in the world cup.