that is "H32B" controller, not your "H32" . they are different product.
here is original firmware for KC868-H32
2--H32_Relay_32.zip
if you want KC868-H32 controller work with tuya app, you should add tuya adapter, here is video tour:
https://youtu.be/z67pRMLb4Rc
here is original firmware for KC868-H32
2--H32_Relay_32.zip
if you want KC868-H32 controller work with tuya app, you should add tuya adapter, here is video tour:
https://youtu.be/z67pRMLb4Rc