How to access archived/ missing messages
If certain messages or conversations are missing from your inbox. This likely means that they are archived or saved for later. To access your archived messages please go into the Messages section of the app then tap the 'filter' icon in the top right-hand corner and then tap on 'Show archived messages'. Return to your messaging inbox and you will be able to access all your archived messages.
To archive a conversation, apply a long tap on it from within the messaging inbox and that will open the option to archive it.