Update: Took my Stinger in for the 5th time to get my sunroof creaking fixed (after picking it up late last week for the last "so-called" repair". Have to say I lost my SHIT with them today (but no yelling or swearing so my son says he is proud of me hahahaha), but I gave them a piece of my mind and told them what I thought of how they have been conducting things. I insisted to speak to the lead mechanic (the manager is away until tomorrow, but he got a lovely email from me over the weekend), and told him that I am over him pretending that he has fixed the issue when in actual fact he has made it worse. I told him that the car should never be returned to a customer as "repaired" when it obviously has not been. I also mentioned that the 7 year warranty on Kia cars means nothing if problems aren't actually fixed as they arise. As I left I told the supervisor not to dare call me to collect the car until it is near perfect! She told me that they have contacted a Kia specialist to come and take the car for a test drive to look at the problem, and I replied that I thought their mechanics WERE Kia specialists!!!

I had videoed the noises that it made on the drive home from the last time it was "fixed" and showed them. They asked me to send to them but the file was too big and I could only send them trimmed sections. Regardless, I told them to take it for a drive now and make their own video of it. It's not a sometimes issue. It happens EVERY time I take the car for a drive.
I have found a new problem since they have replaced my transmission as well. The
seat does not move back in the mornings like it used to. It does almost every other time, but every morning it stays put. This is another issue they say they could not reproduce yet I had videoed it to show them.
I have contacted Kia Australia and made a formal complaint with them as well, and they say they will be chasing this up. If nothing is done, I guarantee you Mt Vesuvius will erupt and they will have a war on their hands. For their flagship top of the range car, these issues should NOT be happening, and at the very least, be repaired effectively before returning to the owners.
Here is a link to a video I took on the way home from the last "fix". Noises start at 17 sec. At first they sound like a pen clicking, and then around 1:16 it sounds like a creaking ship.
20200709_170906.mp4