The plan to deprecate Chrome V2 extensions has been constantly postponed again and again for years now. There is NO SCHEDULED DATE for this to happen currently, and when it is announced it will be more than 6 months out.

Source: https://groups.google.com/a/chromium.org/g/chromium-extensions/c/zQ77HkGmK9E/m/HjaaCIG-BQAJ?pli=1

If Google really wanted to kill ad blockers, they would have done this years ago.

They don’t. They want to force ad blockers and other similar extensions to use more efficient APIs that don’t slow down the web. Extension developers overall (not just ad blockers) aren’t happy with the changes, so they’re still working on the APIs.