So far, there seems to be no official news confirming that 'Fatah 3 = the Pakistani version of HD-1.' All the news comes from netizens and the media, based on speculations from photo comparisons.
As for 'ToT,' the key issue does not lie with Pakistan, but with this Chinese company.
Guangdong Hongda Blasting Co.,Ltd.
It was originally a local government-owned enterprise engaged in civil blasting projects. Later, it underwent enterprise system reform and became a privately-owned listed company. Afterwards, through capital integration, it merged with several related companies and obtained military product production qualifications.
However, through in-depth analysis, we can be 100% certain that all the company's “HD” series missiles are assembled and integrated products. The company completely lacks full industrial chain production capabilities, and even more so lacks the production and R&D capabilities for related subsystems. For example, missile guidance systems, propulsion systems, and so on.
To give an example that a Pakistani friend might understand better, the production mode of this company's HD series missiles is like India producing iPhones. It is uncertain whether Pakistani friends can understand this phenomenon.
If Pakistan really discusses the ToT of the HD series missiles with Guangdong Hongda, its actual significance would be very small. Pakistan would still need, like Guangdong Hongda, to purchase a large number of components from China's vast component supply market.