Ok cool! That one is a sound I made on Diva actually, most of the sound comes from the processing. I think I used a fast heavily filtered delay from Soundtoys Little PrimalTap, a long modulated reverb from Valhalla VintageVerb and some Valhalla Shimmer and then slammed it pretty hard with u-he Satin which gives it that slightly distorted tone and glues the reverb nicely.
Tbh those quick arps are mostly about the notes, I usually just draw them in. I mostly use the pentatonic scale and either 16th triplet or 32nd notes.
