Steps:
- reset the Watch
- make sure to let them boot up fully to hello screen
- then enter DFU and run the tool
- pair with iPhone and enjoy

Make sure to not use watchOS 6 or 7 ramdisk on watchOS 8 as this can cause bootloop
Watch Video Guide: https://www.youtube.com/watch?v=nN0PCVbd8WQ
Download Link: https://bit.ly/3xgFbrx