The dealer ordering system letting you know what is available. I'm not sure what causes this but some vehicles have DSA included with max tow and others are a separate option that was added. You can find Max tow without DSA as well
On sport S if you select the 8.4" Radio and Premium Audio...
The Jeep site is not always updated to match the dealer ordering system. Dealers can place orders for them right now Auto or Manual
You can see the order options on this post 2020 Jeep Gladiator (JT) ORDER GUIDE!! [Updated Monthly]
I am able to configure vehicles with both DSA Anti-Spin Differential Rear Axle and AJQ Max Tow Package w/ 4.10 Axle Ratio
Also if you try to order AEK 8.4" Radio and Premium Audio Group it requires one of the following options AEH Popular Equipment Package or AAN - Technology Group
There is a new package available on Sport S and Overland Gladiators for anyone who has not yet placed an order please consider selecting this package.
Full package details are in the January 27, 2020 Order Guide...