For example...the Suzuki Jimny JB64 and JB74W are orinially rear wheel drive not 4 wheel drive... it would be really cool if you could actually change the drivetrain mode like in real life for example. From RWD to 4WD HIGH & 4WD LOW instead of having to use torque centre adjustments via using %... all cars that are originally 4WD OR AWD should have torque adjuster... please update Gran Turismo 7...i have a Jimny so i know this would be an awesome updatr in the game and makeing it more realistic considering its a realistic simualtion driving experience.
The Jimny being full-time 4WD in GT7 despite not having a centre diff is a peeve of mine, too, but I don't expect that to be addressed until the next game or later.
The "Contact Us" page on PD's website eventually leads to "no, you may not"; so your best chances at having your grievances quickly glanced at by someone who knows someone who knows someone who could do something about it are:
Follow the Contact Us link to eventually reach PlayStation Support Japan (or a local branch) and, despite there not being a support category for development suggestions, sending your request anyway to see how it goes.
Sending a letter to their office
Commenting on tweets by Kaz with the desperate folks who think posting pictures of cars there might get them seen for a few milliseconds, and therefore into the game faster.