Hi! I can’t repair my I watch with my phone

Follow these steps: https://support.apple.com/guide/watch/set-up-and-pair-your-apple-watch-with-iphone-apdde4d6f98e/watchos

What model of phone is it and what version of ios is it running?

What model of watch is it and what version of WatchOS is it running?.

What troubleshooting steps have you tried?.

What errror messages are you receiving?.

Has this watch ever been paired to another phone?