Be default contact shadows look like this from a distance:

Open this file in Inspector

Assets\HDRPDefaultResources\HDRenderPipelineGlobalSettings

All these settings on a screenshot are affecting contact shadows quality:

In MirageCreative scene Contact Shadows are generated by Spot Light object:

If you select it in Hierarchy view then in Inspector scroll to the bottom to see:

You can select different quality or choose Custom and deactivate a checkbox.

These three quality (Low, Medium, High) are connected to Quality dropdown from top most settings screenshot: