Discord is pretty horrible when compared to Slack… can’t change the tiny font size for starters
Even under accessibility you can only change things like contrast
A quick Google search says that for iOS 15+:
>To change per-app settings for any application, including Discord, on an iPhone or iPad, go to the Settings app > Accessibility > Per-App Settings. Tap Add App, select Discord from the list, and then customize settings like Display & Text Size to alter the app's appearance or behavior without affecting other applications.
Unfortunately it’s still somewhat screwed up with the sidebar font being too big compared to the message text