Not true according to their own website and also the disclaimers posted a few times.
From their website:
"IAA sells
lightly damaged, salvage and
clear-title vehicles, parts cars, trucks, SUVs, motorcycles and heavy equipment at auctions across the United States. Preview our huge selection of vehicles free of charge then register to view auctions and bid."
Online Car Auctions: Salvage, Repairable & Used | IAA-Insurance Auto Auctions
Seems like companies use them to auction off even vehicles they don't total.
Disclaimer says IAAI only reports to the NMVTIS as a junk/salvage auctioner, as such every sale reported ends up reporting as such.
Unless the title is proven clean and they made a mistake, they will not restore it without doing a salvage inspection (an inspection which the OP has not done).
Tesla to allow salvaged vehicles back on Supercharger network
Here's a different case that they restored it based on a proven clean title, with no actual salvage inspection, meaning they canceled the salvage status (not the same as certified salvage).
Clean Title, 10k Damage Accident, but Tesla Claims Salvaged Title
Most of the cars that this happens to are older cars (for example that one I linked is a 2019), as such warranty has either expired or it's close enough to expiring the posters may not inquire about the warranty. I guess we will see what happens in this case given it's a newer car at 2021.
But the point I'm making is DMV has no record of them declaring it as salvage (which by CA law they are required to do in 10 days of making such a determination, regardless if they used a insurance company or if they self insured). As such legally it's a clean vehicle, presuming the OP has checked the most recent status at DMV.