Read the T&C for your Plat card. I know the USA consumer version doesn't cover car repairs, IIRC including parts so tires might be included in this provision.

Also check what your comprehensive auto insurance covers, which typically has a lower deductible than collision coverage. IIRC USA car insurance sometimes puts windshield damage coverage under a separate rider which doesn't cost much. I guess the likely risks would be tornado/wind damage and damage from stones falling from a nearby truck, etc. Think about what windshield replacement or repair would cost and whether you want to self insure on this.

BTW, was it literally a windshield warranty (compensation for manufacturing defects) or insurance coverage?

IME the tire coverage includes wheels, rims, etc. that can be damaged by potholes and cause bigger repair bills than just tire replacement and installation.