These were the top 20 selling manga in October 2022, according to NPD BookScan:

  1. My Hero Academia Volume 32 by Kohei Horikoshi
  2. Chainsaw Man Volume 1 by Tatsuki Fujimoto
  3. Kaiju No. 8 Volume 4 by Naoya Matsumoto
  4. Chainsaw Man Volume 2 by Tatsuki Fujimoto
  5. Spy x Family Volume 8 by Tatsuya Endo
  6. Chainsaw Man Volume 3 by Tatsuki Fujimoto
  7. Chainsaw Man Volume 4 by Tatsuki Fujimoto
  8. Toilet-Bound Hanako-kun Volume 16 by Aidairo
  9. Chainsaw Man Volume 10 by Tatsuki Fujimoto
  10. Chainsaw Man Volume 11 by Tatsuki Fujimoto
  11. Demon Slayer: Kimetsu no Yaiba Volume 1 by Koyoharu Gotouge
  12. Chainsaw Man Volume 7 by Tatsuki Fujimoto
  13. Komi Can’t Communicate Volume 21 by Tomohito Oda
  14. Chainsaw Man Volume 9 by Tatsuki Fujimoto
  15. Dandadan Volume 1 by Yukinobu Tatsu
  16. Chainsaw Man Volume 5 by Tatsuki Fujimoto
  17. Jujutsu Kaisen Volume 0 by Gege Akutami
  18. Chainsaw Man Volume 6 by Tatsuki Fujimoto
  19. Jujutsu Kaisen Volume 17 by Gege Akutami
  20. Jujutsu Kaisen Volume 1 by Gege Akutami

Source: The Fandom Post