> January 17, 2022: New Manifest V2 extensions will no longer be accepted by the Chrome Web Store. Developers may still push updates to existing Manifest V2 extensions, but no new Manifest V2 items may be submitted.
> January 2023: The Chrome browser will no longer run Manifest V2 extensions. Developers may no longer push updates to existing Manifest V2 extensions.
So V2 would be disabled in the stable channel simultaneously with the end of updates, in January 2023.
Only a special enterprise policy could keep V2 extensions running for a while after that time.
> There are two key dates for the phase-out:
> January 17, 2022: New Manifest V2 extensions will no longer be accepted by the Chrome Web Store. Developers may still push updates to existing Manifest V2 extensions, but no new Manifest V2 items may be submitted.
> January 2023: The Chrome browser will no longer run Manifest V2 extensions. Developers may no longer push updates to existing Manifest V2 extensions.
So V2 would be disabled in the stable channel simultaneously with the end of updates, in January 2023.
Only a special enterprise policy could keep V2 extensions running for a while after that time.