Use Screen Time to hide apps: Settings → Screen Time → Content & Privacy Restrictions → Allowed Apps (or App Limits) → disable the apps you want hidden
Remove apps from the Home Screen: Long-press the app icon → Remove App → move to App Library (do not delete)
Hide purchase/download options: Settings → Screen Time → Content & Privacy Restrictions → iTunes & App Store Purchases → disable installing/deleting apps
Hide App Store / iTunes purchases: Settings → Screen Time → Content & Privacy Restrictions → iTunes & App Store Purchases → set allowed actions to “Don’t Allow”
Use Focus to reduce visibility: Settings → Focus → choose or create a Focus mode → set allowed notifications to only essentials so app notifications don’t reveal usage
Hide notifications from specific apps: Settings → Notifications → select app → turn off “Allow Notifications”
Use Guided Access for a single app/session: Settings → Accessibility → Guided Access → turn on → open the app → triple-click Side button → Start
Hide app previews: Settings → Notifications → Show Previews → Never
Use App Library (no icon on Home Screen): Swipe to the rightmost Home Screen page → use App Library to access apps without placing icons on the Home Screen