I also love that app sizes get super bloated (several gigs per app) due to cached safari data from the in-app web view. Seems the only way to clear it is to go into settings and wipe the website data for safari entirely. I don't believe app developers can clear this themselves either, despite it appearing as their app taking up so much space when really it's just due to safari cache that seemingly doesn't clear on its own.
THAT is the source for the bloat? Oh dear. Absolutely shambolic. It is embarrassing that iOS gives no way to just completely nuke an app's cache, short of reinstalling the app.
Some apps have a setting to clear data and I swear I’ve seen cached data in that before but I could be mistaken
I know they do, but the effectiveness of these "clear data" settings varies wildly and it's mildly infuriating. For instance, in my experience Telegram's works pretty well, X's not at all.