Rule change...and apparently the Japanese sued IFSC because they confirmed their 2 quota places from the WCH but they want to be able to qualify more climbers and then choose 2 among them:
"The Japanese Mountains and Sports Climbing Association’s (JMSCA) original interpretation of the IFSC rules would allow them to essentially qualify their athletes for the Olympics at all three Olympic qualifying event. By their interpretation, they would have a pool of five athletes per gender (two from the World Championships, two from Toulouse and one from the Asian Championships) to choose from. If they named one athlete per gender (Tomoa Narasaki and Akiyo Noguchi) from the World Championships as their Olympic picks, then they essentially protected their host country spot until the end of the selection process. However, because the JMSCA named two athletes per gender for the Olympics following the World Championships (Narasaki and Kai Harada and Noguchi and Miho Nonaka), the IFSC is saying that Japan has filled their quota, used their host country spot, and competing at other Olympic qualifying events is pointless." (https://www.gymclimber.com/ifsc-sued-by-japanese-climbing-federation-and-athlete-invitations-frozen/)
This is insane from the Japanese federation honestly, they should have refused one quota and kept the host quota which was the only one given to the NOC rather than the athlete.