The last episode of the anime, 400 (34 from Thousand-year Blood War), adapts chapter 635 from page 13 to 17, chapter 636, chapter 637, chapter 638 and chapter 639. Then the story would continue on page 2 of chapter 640, this is the chapter of the manga that you have to read after the anime, it corresponds to Volume 70 that collects the chapters 633 to 642.
The last arc of the Bleach manga is currently being adapted, this after the anime stopped at episode 366, but in 2022 the broadcast of Tite Kubo's work would return, after a wait of more than 10 years. If you decide to start reading the manga, 58 chapters would await you.
The last chapter of the manga is 686, and the last volume is 74 that compiles the chapters from 675 to 686, this in case you want to buy the corresponding manga volume.
Bleach Episode to Chapter Conversion
To conclude, in this table, I will summarize the equivalence between anime and manga:
| LAST EPISODE (ANIME): | CHAPTERS (MANGA): | VOLUME: |
|---|---|---|
400 |
Chapter 635 (p. 13-17), 636, 637, 638 and 639 |
Volume 70 (chaps. 633-642) |
The anime is currently airing with a new episode premiering every Saturday morning, with the exception of Japanese holidays. The manga is finished and you can read it for free through Manga Plus.