Noticed three missing clips (per side) that attach the rear inner wheel-well liner to the chassis. Reached out to the service department about this, and they instructed me that those clips were deemed "unnecessary" to "cost-down" the car for profitability. I started laughing and decided to just fix it myself.
I ordered replacement Tesla clips from Bellmetric here: D10536 - Tesla Clip [D10536] - $1.65 : Bel-Metric, Metric Hardware, Metric Fasteners, Metric Bolts, Metric Nuts & Time-Sert Thread Repair
The inner wheel-well liner is now appropriately fastened to the chassis, as it was intended/engineered to.
I ordered replacement Tesla clips from Bellmetric here: D10536 - Tesla Clip [D10536] - $1.65 : Bel-Metric, Metric Hardware, Metric Fasteners, Metric Bolts, Metric Nuts & Time-Sert Thread Repair
The inner wheel-well liner is now appropriately fastened to the chassis, as it was intended/engineered to.