As I understand, per-site meta questions can become "hot". For example:
However, this event doesn't show up on their timeline. For the example above, its timeline shows:
This is unlike non-meta questions:
Feature request: Add a "became hot meta question" timeline event.
I'm not 100% sure if this is reasonable, since "hot meta questions" might have a totally different algorithm to "hot network questions". But I thought I'd propose it to check.