For the record, you did start three threads:
Gyeon leather shield - smoke while applying?!
Gyeon Leather Shield Streaks in black seats?!
GYEON LeatherShield - Stay Away
I guess the issue with a 'leather' coating is that leather is probably ok with having a bit of a 'shine' on it and leather will also absorb the liquid better.
The black matt 'vegan' leather on a Tesla would look terrible with a (patchy) shine.
I saw your first post and then your second and didnt bother responding because I suspected maybe you were spamming the forum - perhaps just user error and stress.
But I did check the GYEON site and product description and they did say it was ok for 'artificial leathers', so it implied it should have been fine. Strangely, I just looked back and cant see anything but 'leather' mentioned now for both their products:
Q² LEATHERSHIELD EVO - GYEON
Q² LEATHERCOAT REDEFINED - GYEON
You said in your first post something about 'smoke' - so I wonder if you applied it to very hot seats?
I would leave it alone for a couple of weeks, then try some decent quality cleaning products - maybe someone can suggest something.