Apologies for not seeing your post after zeOrb. I had started typing and went to do something and came back and posted at which point you had already posted yours. durh. oh well. Now to the troubleshooting!
Distance Fields is a dynamic lighting solution and does not require lighting builds.
Looking at your settings you’ve got the light mobility set to Stationary, which doesn’t work with Distance Field Soft Shadows. Change this to Movable and make sure that Ray Traced Distance Fields are enabled, if not already.
Once you make the switch it should similar to this:
If you need to troubleshoot your mesh distance fields or the shadows look incorrect you can visualize the distance fields by going to Show > Visualize > Mesh Distance Fields in the viewport. This will show you a view like this:
If you’re shadows look incorrect or your shadows have holes you can see here how the mesh distance fields are calculated in order to create your shadows. If you see any holes in your mesh you’ll want to increase the Distance Field Resolution. Only increase in single digit increments as this method is generating a mesh that the shadows will be based off of. Using higher values creates a more complex mesh for these shadow and is more expensive.