In no particular order

    - Meetings
    - Reading papers
    - Understanding legacy code
    - Reading internal news
    - Ad hoc chats with coworkers
    - Writing docs
    - Editing configs
    - Thinking about solutions
    - Slacking off
    - Analyzing results
    - Testing code
    - Reviewing PRs
    - Understanding others' ongoing projects

AI can do everything you listed except chats with coworkers and slacking off.

I just don't think you've utilized the most recent versions of codex or claude.