The European Qualifying will send 20 teams to the tournament, i.e the top two of each qualifying group, 4 more countries will qualify via the European Nations League
The UEFA Nations League is entirely new kettle of UEFA money-grabbing fish
Basically all 55 confederations are split into 4 leagues dependent on strength, so League A has the highest ranked, League D has the lowest ranked
Within each league there are 4 groups and the winners of each group are put into a playoff against the winners of the other groups within their leagues and whoever wins each playoff goes into the tournament
Apparently its a "more streamlined qualification process"