No one is "micro managing" throughout secondary school. When we did it, we only "micro managed" for the first couple of weeks to establish the pattern and good habits. Luckily, for the first few weeks, his teachers were also pretty good with giving homework on the appointed day as per homework calendar, putting it up on the SMH app, and collecting/marking it on the right day. So it was "good habits" from both sides.
That sets the pattern/habit.
After that, we were "helicoptering" his homework, i.e. leaving him to it, but under the general principle of doing it on the day it was set wherever possible. We never checked he'd actually done what he was supposed to each day. Our input was simply a reminder every day after evening meal to do his homework first, before gaming or whatever. We relied on him to do the work and be honest when he said he'd done it, or had nothing to do.
That pattern/habit endured throughout the next five years. Just gentle "nudges" from us to remind him to do it or if there was something going on, like a family gathering, short break, weekend away, we'd warn him in advance to be fully up to date.
As a result of good habits, we never had the "Sunday night panic" of realising there were things he'd forgotten to do, never had him panicking about a revision test he'd forgotten to revise for etc.
Getting the habits/behaviour sorted from the earliest possible time avoids problems later on.