They are likely to be MFI aids. Apple evidently enhanced the driver for BT Low Power. The standard doesn’t have a bi-directional speech service in it as yet. If Apple doesn’t submit it to the BT standards committee, it may be reverse engineered over time while avoiding any Apple patents. Then Apple will likely sue as would a host of tech companies.
I don’t know how long it will take for Android to provide what Apple has. Part is the hardware which must be capable of servicing the driver. That part is obvious with Samsung which has a premium BT part and can do adjustments but cannot transmit the sounds.
It will be interesting to see what Octicon comes up with. I’m not an Apple fanboy but I did get a used 5s to work with my KS6. I also have a phone clip for Android. I found it annoying and broke it once – which they covered. Actually, the sound through the Android phone with phone clip seemed somewhat better. But not enough to give up the convenience.