Installed my Steeda sway bar a few weeks ago, amazing upgrade as everyone has said, it's a must-have for even stock STs.
Anyway, not sure if anyone else experienced this same issue, but I had a nasty creaking noise when just taking off from a stop and going up driveways. But never at above 5mph. So I took the mufflers and hear shields back off to see if there was something wrong. I noticed the lower sway nar bracket bolts were just touching off on the subframe. I don't have pics but if you did this install yourself you know they are very close. The included Steeda bolts have a larger head, and a very fat washer. So I swapped back to the factory bolt on the bottom, kept the fat Steeda washer, and now there's plenty of clearance and no creaking.
Maybe this was an isolated issue on my car, we know the production tolerances on these, especially 2020s, leave a lot to be desired, but just passing this on if you experienced anything similar.