Yes, Snapchat can be restricted on iPhone without deleting the app or your account. Use Screen Time App Limits for a daily boundary, Downtime for scheduled hours, or a dedicated blocker such as Fella when Snapchat needs to stay unavailable by default. The right choice depends on whether you need a reminder, a schedule, or more friction before opening the app.
Muting notifications, hiding Snapchat, and deleting Snapchat are different actions. Notifications and the Home Screen can reduce cues, but Snapchat still opens from Search, the App Library, or a link. Deleting the app removes it from this iPhone; it does not itself delete a Snapchat account. Restricting access leaves the app installed.
Blocking affects the whole app. That includes messages, Stories, and Snap Map. It is useful when you want fewer compulsive checks, not when you need Snapchat available throughout the day. If you are setting a limit for someone else, use Screen Time family controls—not Fella, which is for your own device.