Mick bought the iPhone XS and wanted to migrate all his text messages to the new phone. Leo says in the iPhone message settings, there is a backup to iCloud feature. But it has to be on beforehand in order to save all messages in the cloud. Otherwise, they are stored locally.
Mick's wife is also having trouble with Face ID, which will unlock for her daughter. Leo says they can train it better using the "setup with alternate appearance" option.