To recover your two year old deleted WhatsApp photos you have two solutions : either use a backup or download an application that will specifically help in recovering your data. The data recovery application that we advise for you are MiniTool Mobile Recovery and iMyFone D-Back. They can both be used with Android and IPhone. If you know that you have a backup, like on Google Drive for instance, then you just need to connect your device and authorize the deleted files to come back to your phone.