При обновлении ПО сгрузились приложения и не скачались обратно

Did you already force restart your iPhone?

Force restart iPhone - Apple Support

Or delete the icons and redownload the apps from your previous purchase list?

Redownload apps from Apple - Apple Support

Повторная загрузка приложений Apple - Служба поддержки Apple (RU)

Apps and other content from Apple are country specific.

If you have changed the Apple Account region, for example, this will also affect the available apps in the AppStore.

Change your Apple Account country or region - Apple Support