Hey, thanks for the info, but as @callum_emery said, the ability to set the edge lighting colour individual for each app is missing, meaning that for example, I had Snapchat use yellow edge lighting, but on One UI 3, the app colour sets it as blue with no ability to change it. Also tiktok gives grey edge lighting which is almost invisible.
Thanks for the help though and I hope to see the individual app colour feature reimplemented.