This task is about enabling/turning on the Topic Subscriptions A/B test at the `===Participating wikis` (listed below).
=== Deployment timing
//Ideally//, the A/B test will begin on !!Tuesday, 31 May 2022!!.
=== Participating wikis
//Copied from T304027.//
|ID|Wiki|Code
|---|---|---
| 1.| Amharic Wikipedia | amwiki
|2. | Egyptian Wikipedia | arzwiki
|3. | Bengali Wikipedia | bnwiki
|4. | Spanish Wikipedia | eswiki
|5. | Persian Wikipedia | fawiki
|6. | French Wikipedia
|7. | Hebrew Wikipedia | hewiki
|8. | Hindi Wikipedia | hiwiki
|9. | Indonesia Wikipedia | idwiki
|10. | Italian Wikipedia | itwiki
|11. | Japanese | jawiki
|12. | Korean Wikipedia | kowiki
|13. | Dutch Wikipedia | nlwiki
|14. | Oromo Wikipedia | omwiki
|15. | Polish Wikipedia | plwiki
|16. | Portuguese Wikipedia | ptwiki
|17. | Thai Wikipedia | thwiki
|18. | Ukrainian Wikipedia | ukwiki
|19. | Vietnamese Wikipedia | viwiki
|20. | Chinese Wikipedia | zhwiki
=== Done
- [x] @ppelberg to document `===Deployment timing`
- [ ] @MNeisler Verify people at the `===Participating wikis` are being bucketed in the ways we defined in T304030