I am not electrician. I have rewired two houses (nec2017) as permitted homeowner and doing third currently.
The way I've done it is as described in this thread. Get everything ready so a handyman/apprentice with a screwdriver can put all the devices (switches, receptacles, etc.) in.
The way I understand a rough inspection is that inspector wants to see that everything is done properly --as if it were complete/finished and energized. So the whole "made up" thing is inspector wanting to see whatever you are going to do with it all hooked up: crimps, wire nuts, pigtails, etc. as if there were devices in the box. That means that the entire circuit is "ready to go". Which also means that a circuit could be accidentally energized by flipping a breaker, which is why the back-and-forth over stripping & wire nuts at the boxes or don't strip and (?? tape, wire nut, do nothing) or leave not attached in panel, etc.
Both roughs I've been through the inspector wanted to see the main panel completely done. Not sure why, but inspector wanted to see main panel DONE. For full disclosure, I had temp power during that time so panel I was working in didn't have entrance wires in the mast and no meter.
There are a LOT of legit sparkys on this forum as well as a bunch of non-electricians who have probably forgotten more than I know.
If I were doing a sub panel within line of sight of the main panel I would hook everything up inside main panel, run all the wires to sub panel, bend and cut them to length but not strip off the jackets. Then I'd probably tape or wire nut & tape the ends of the conductors. and go about wiring the rest of the sub panel's circuits.
If the sub panel was not within line of sight of the main panel, I'd put a lockout switch next to or within line of sight of the main panel and do as I described above, breaker in main panel off, conductors hooked up in main panel, inside lockout box I'd measure & cut to length but not strip jackets and either tape or nut and tape the conductors. Then I'd hook everything else up (conductors going to sub panel at both ends) and go from there. I'd also lock the lockout box.
Personally that's what I would do. They want to see that everything is done and ready to go so you need to take precaution that stuff can't be accidentally turned on.
If I'm wrong hopefully someone will correct me.