I read it in a press release somewhere, and photos of a non PP FX have been posted on this site showing different wheels and non recaros. I'll try to dig it up.
I'm 99% sure I read that the recaros come as part of the PP version of the FX package. Also note that the wheels are different between PP and non-PP (both are white). The turbine style only comes on the PP.
Just for the record, Ford has been saying they need to cut weight on the Mustang for the last 3 generations. For whatnever reason it never comes to fruition.
This is a good read that may help some people on the subject.
https://autoupgradeclub.com/blogs/our-blog/stereo-vs-surround-sound-in-cars-enhancing-your-audio-experience#:~:text=If you're an audiophile,well meet all your needs.
Its pretty well established that no dealer knows anything about this and there is no TSB. Why it suddenly got fixed halfway through the the '25 production is a mystery in itself. Going to the dealer to demand a fix is the definition of insanity at this point.