WhatsApp media is not showing up from WhatsApp account when migrated from old phone
I took help from this Quora post, and I figured out that WhatsApp is installed in internal memory. That's why it isn't able pick up the pictures/media from the SD card. Here is what I did.


I renamed the WhatsApp folder in the internal memory. From Whatsapp to Whatsapp_backup.
Rebooted the phone.
Downloaded an image from a chat. This forced to create another Whatsapp folder to be created in internal memory.
Then moved all the content from SD Card/Whatsapp/Media to Internal Whatsapp/Media folder.
Then I closed WhatsApp and started again. This made WhatsApp to refresh the memory index and pick the media file according to chats.