Everyone is panicking about Badminton qualifications but qualification is not that difficult even for Kidambi, Ashwini-Sikki, and either of XD pairs.
Breaking it up by events
Men Singles: Two players from same NOC need to be in top 16 for qualify. Sai Praneeth is comfortable in 8th but no other players in top 16. There are many likely candidates who have potential like Kashyap, Prannoy or Lakshya Sen but lets focus on Kidambi, who is currently about 17000 points away from 16th spot which looks tough at first sight but if we have a look at how ranking system works then its not that difficult. Kidambi is currently playing only Grade 2 tournaments and just participating in them garners atleast 2000-3000 points. Agreed that even the top 16 are also participating in these events, but still Kidambi even reaches quarterfinals consistently he can qualify.
Women Singles: Sindhu is safe in 6th but Saina is only 8000 points away and needs minimum consistent quarterfinal finishes to qualify
Women Doubles: Doubles is generally top heavy and the pairs from other nations are average. The pairs till Dutch pair Piek-Sienen are consistent and they should qualify. Ashwini-Sikki should qualify in top 14 as last two spots are likely to be continental quotas. They are just 2000 points away from the Russian pair, they are also probably better than the Canadian pair who are in 12th
Mixed Doubles: The question is not whether an Indian pair will qualify, but which pair will; either of Satwik-Ashwini or Pranaav-Sikki. My money is on Satwik-Ashwini. Both of them are on 30000 points and 4000 points away from 14th place. Either of them can overtake the French at 12th and German at 11th
Ranking System is given below
https://extranet.bwfbadminton.com/docs/document-system/81/1466/1471/Section 5.3.3.1 - World Ranking System.pdf