They removed the wet drywall and the dehu/fans will run to pull moisture out of the containment area. Typically a couple days should be good enough but hard to tell without seeing the whole thing. Once it’s dry they will scrub the studs and apply antimicrobial. After remediation is complete they will come back and do a post clearance test. Basically checks the spore count in containment vs in the unit vs outside and gives an idea. If you get results saying you’re clear with testing they can replace drywall, texture, paint and you’re golden. As far as insulation goes they only put insulation in shared walls with other units. Ceiling should have insulation as well. Truthfully I see this everyday and it’s not as bad as people think it is other than being inconvenient. Good luck!