Sorry for the late reply.
You can press M-up / M-down to manually sort agenda items once the agenda view is open.
It's just a convenient way to do minor adjustments. No files are actually changed.

On Mon, Apr 19, 2021 at 12:55 PM Ben Sima <ben@bsima.me> wrote:
Heh, I just found myself wanting to do this. I often use C-c ^ to sort
subtrees by creation date, and I wanted to do that with my global TODO
list just now, but couldn't figure out how.

So, imo there is at least a small need for this feature.