We are updating our app and would like to temporarily unpublish it from the app store so that new users don't find and download our app. Is that possible? And if we unpublish the app, is it easy to get it added back to the store? Will we still have access to our app store assets and content?
But if you remove the app from the store, you risk to loose the name of the app… And may have problem to re establish.
I do advise not to do to avoid any bad side effect.
The simplest is probably to remove all countries where the app is available (except a tiny country if Appstore Connect requests at least one). And reset when you publish new version.