I need to update an IOS App adding some warning and last indications but at the same time the App will be removed from the store, for example, the soccer championship 2019. Do I can do that or the App cannot be updated once removed from the store?
An App can be update to latest version after the App was removed from the App store?
Updated by you, sure, if you by 'removed' you mean taken off sale.
Updated/downloaded by users, no.