No mystery to it. Here is exactly what happens from the moment you call to the moment we hand the job back.
Access is measured, shell construction identified, and the partial-versus-full decision made against what you intend to do with the space afterwards.
The demolition permit is pulled, utilities to the pool equipment are located and disconnected properly, and the drainage inspection is scheduled into the sequence.
Water is pumped down and discharged appropriately, then the shell is broken up to the extent the chosen method requires. Rebar is cut and separated for recycling where present.
Fill goes in in layers, each compacted before the next. This is slow and unglamorous and is precisely what you are paying for. Ask to see it happening.
The surface is graded to shed water away from the house, topsoil placed, and documentation of the permit and any compaction testing handed over for your records.
None of this is required — it just makes the visit quicker.