I've learned that despite winning the cup, Chelsea have not secured a spot in the next edition of the FIFA Club World Cup, which will take place in 4 years. They have to re-earn the spot.
What's funny is that PSG already earned their spot in the 2029 edition by virtue of winning last season's Champions League.

On a side note, Chelsea are estimated to have earned £85m (~$114m) by winning the competition, according to Sky Sports News, while PSG got £78.4m (~$105m).