It is about 2021 onwards, which should not surprise anyone who has paid attention.
Edit: Also here now, as another user posted: https://www.washingtonexaminer.com/news/house/3134499/mark-z...
Which, makes sense, given Trump was president. Zuckerberg does say prior general warnings about Russian disinformation caused Meta to initially demote it for a period, since it made them skeptical of it. But those warnings weren't related to a specific incident, like the laptop/hard drives/iCloud accounts of Hunter Biden.