From what I can tell from this forum, the SX trim has been the most popular trim which I guess was a surprise to KIA so they were slow to ramp up production of those to meet demand. Then in May, I believe, production of vehicles with Prestige package had to be halted due to a shortage of the Nappa leather and possibly other components of that package. Then you can find a thread on this forum (production by color/trim) which shows the most highly produced exterior and interior colors by trim level and option level and you can see that some color combinations are just produced in few numbers. And then what is holding up people from getting their orders fulfilled is adding lots of options to the build like you did.
What is important to understand is that KIA does not receive a placed order and then produce the vehicle in the order they received it. Instead, the plant in GA produces whatever vehicle it wants with whatever options it wants on it and then they match it up with dealerships' confirmed orders and ship the vehicles there. And the number of vehicles each dealer receives in a given period of time also depends on that dealership's past sales numbers. Smaller dealerships receive less vehicles so the chances it gets one the one you ordered goes down. But at the same time, a larger dealership may have placed a lot of similar orders in front of yours and those customers will, I assume, have first right of refusal when the vehicle arrives if the dealership is playing by the rules. Some do not as I've seen and will offer ordered vehicles to new customers if they are willing to pay a markup. This is not the norm but it has happened to some on this forum.
Lastly, if you add a lot of small options, chances are fewer that KIA just so happened to make that exact vehicle. So it may be best to just order the basics that you must have (Trim level, exterior and interior colors, and tow package if you want one) and negotiate having your dealer install the other options once they receive the base vehicle. Again, this is all from what I've gathered reading on this forum so I may not have all my facts straight. Hope this helps but have fun reading through all of the forum. It's very informative stuff for sure. Welcome to the forum.