It is possible to get back deleted messages on WhatsApp without a backup on iPhone, but it is not always guaranteed. There are certain conditions and restrictions that must be met in order for this to be successful.
The first step in trying to restore deleted messages on WhatsApp without a backup is to see if there is an available local backup. This can be done by going into the WhatsApp settings, then tapping on “Chat Settings” and then “Chat Backup”. If you see that there is a local backup available, then you can restore the messages from this backup file.
If no local backup is available, then you will need to try and recover the deleted messages from your iCloud account. To do this, you will need to enable iCloud backups in WhatsApp.
This can be done by going into the WhatsApp settings and then tapping on “Chat Settings” and then “Chat Backup”. From here you can enable iCloud backups and set up a schedule for when they should be taken.
Once iCloud backups have been enabled, it is possible to recover any deleted messages from these backups. To do this, you will need access to your iCloud account either through a computer or another iOS device. Once you have access, you can go into the iCloud settings and select “Restore Data”. You will then be able to see all of the available backups that have been taken of your data.
The next step is to select the backup that contains the messages that were deleted and click “Restore”.
This should restore all of the data in that particular backup including any deleted messages. Keep in mind though that if other data was added or changed since the backup was taken, it may not be restored correctly.
Conclusion:
In conclusion, it is possible to get back deleted messages on WhatsApp without a backup on iPhone but it requires access to an existing local or iCloud backup file which may not always be available. It also requires some technical knowledge in order to complete all of the steps correctly so it may not always be successful.