Seeing their journey and ability in the Copa America some time ago could be a reason for us to favorite Brazil and Argentina as the 2022 world cup champions, but I don't think we can forget Spain which also has a young and strong squad as champions competitors, but to be honest from the depth of the existing squad I prefer to make Belgia as my favourite, even though they have now dropped to FIFA 2nd place but the current Belgian squad is quite capable besides that they also get relatively easy opponents in the group phase.
Brazil has a very good squad that is capable of competing favorably for the world cup trophy. But I cannot say the same for the Argentine side. Most of Argentina's key players are getting old, hence they might not be very strong in the world Cup. The Belgian side is not as strong as they were last four years. They drew with a lowly rated Wales and lost woefully to the Netherlands in the European Nation's league. They might be able to get to the quarter finals because they are not currently strong enough to lift the world.