The constraint is not engineering — and it is being solved with engineering
The launch slipped by two months. In the period since it slipped, engineering velocity rose to ~99 commits/day. Meanwhile the product's core content remains unreviewed, because the reviewer has never been hired. Test code cannot produce a corpus. Refactoring cannot produce a reviewer.
Reallocation — From: further engineering. To: a content reviewer — the only line item that moves the launch date.