Discord is getting in on the "AI" trend with testing of new features utilizing user data scraping, potentially for training a large language model. To disable the only settings which might affect your data being utilized for this, go to the Privacy & Safety section of your Settings. From there, toggle off both "Use data to improve Discord" and "Use data to customize my Discord experience."
@Texan_Reverend noted. Is this on a by-client basis or a by-account basis though? I need to know just in case I gotta do it to everything I'm logged into or not
@JamesTDG They're account-level settings. Change them once and they're adjusted everywhere. However, you may want to close and restart Discord on each device to make sure the settings update properly.