Chosen Solution

https://youtu.be/MdDS51J9NeY Please watch above video & kindly tell me solution to pair Update (07/14/2020)

while changing screen technician damaged both side of cables is it caused anything

Sadly, your issue is a mismatch between the display assemblies NFC chip and the user ID you are using on your watch. This happens when you fail to transfer the NFC chip over from your damaged display to the donor display

Your watch is confused! As it sees two different user ID’s one held in the watch and the other what’s held in the NFC chip so to won’t allow you access.

but you told me before I reset Watch NFC not related to pairing & also in my country no Apple Pay

I know on certain generations of apple watch, the force touch sensor is paired to the board. If you damage and replace it, it will pair to the original device it was paired to, but it won’t pair with new devices.