The standard way to check if the information isn't available at all is to run just over one lap, then look at opponents on the replay. I have actually seen instances where the AI cars were not running the advertised compound in a seasonal, IIRC. There may also be one "rabbit" with better than the others - can anyone confirm this?
I'm reasonably certain you can also check the tire limitations on the same event in B-Spec (which may not be practicable, if said event isn't unlocked there yet). Those limitations are shown in many FAQs/event lists, however - such as mygranturismo.