Sunrise/sunset complication Apple Watch not showing

That might be one way but I'd recommend this way instead:

From your phone click Settings, >Privacy &Security, >Location Services, go to Watch Faces and choose "While Using App".

It seems that an update might have been what caused this to be changed

I had thought that the watch got its sunrise/sunset info somehow from the World Clock. However, the complication showed the words, but no data.

After trying everything suggested, I finally discovered it got its information from the weather app you chose to use.

In settings, select Privacy & Security, Location Services and On,

hit the arrow to see that that option is on. Next, scroll down the list of apps and select the one that is your weather app where you already had told that app where you were wanting that location, and select Always for that app. If you don’t select Always, your watch won’t know where to find the sunrise/sunset data you want. It gets it from your weather app.

THIS FINALLY WORKED!! Nothing else has worked for me since the update. THANK YOUUUUUUU

have you tried to edit complications, that is how i got it on my watch face

Change the watch face on your Apple Watch – Apple Support (UK)

Thanks! This suggestion worked.

Finally! Thank you!

THANK YOU!!!! This was the ONLY thing that worked! Blessings!

you're the real hero. solved a huge frustration of mine.

😊 Thank you 😊

Thank you so much for this!