You can follow these steps to get back a WhatsApp conversation that you deleted by accident:
If you already have a backup of your Google Account, make sure you activate it. Do this by:
• Sign in with your Google account and open the Google Drive app.
• Click on "Menu" and then pick "Backups."
• This is where your WhatsApp backups should be saved if you use Google Drive to store them.
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To get back your chat history from a backup of your Google Account:
• Remove WhatsApp from your device and then reinstall it.
• Tap "Restore" when asked if you want to bring back your backup. Don't press "Skip" because you might lose your backup.
• It's important to remember that WhatsApp doesn't store your chat history, so if you lose it, you might not be able to get it back.
• You should make sure that your Android device has enough space for the backup you want to restore.
• When you back up and restore, you must use the same phone number.
If you did these things and have a backup, you should be able to get back the conversations you deleted. If you don't have a backup, you might not be able to get back the messages you deleted.

