If you are trying to remember the messages after Deleting it from the telegram account, and don’t know how to recover deleted telegram messages then, there is no need to worry about it as telegram has the option to
recover your deleted telegram messages. All you need to do is go to the advance setting of your account. And then, you will see “Export Telegram Data” option there. Simply, click on it and that’s it. Your deleted telegram messages have been recovered.