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Alright bros.
This collage is my ultimate cope.
As you can see, in the trailers, they SYSTEMATICALLY don't show the levels of the Gym Leaders, even though they show levels everywhere
This leads me to believe that Gym Battles in Scarlet/Violet straight-up don't use levels. Every Pokémon is at the same level, like in Link Battles.
Hence, like leaker said, it has no scaling, because the battles don't have levels.
Hence, like official site said, you can choose to fight a stronger gym leader first - the difficulty of this being only determined by team composition.
So for once - I will believe in GF's ability to not be retarded.