[v9.4.x] Geomap: Fix default opacity for layers (#63526)

public/app/plugins/panel/geomap/layers/data/dayNightLayer.tsx

@@ -102,7 +102,7 @@ export const dayNightLayer: MapLayerRegistryItem<DayNightConfig> = {
         })
       }),
     });
-    
+
     // Sun circle
     const sunFeature = new Feature({
       geometry: new Point([]),

public/app/plugins/panel/geomap/utils/actions.ts

@@ -4,6 +4,7 @@ import { FrameGeometrySourceMode } from '@grafana/schema';
 
 import { GeomapPanel } from '../GeomapPanel';
 import { geomapLayerRegistry } from '../layers/registry';
+import { defaultStyleConfig } from '../style/types';
 import { GeomapLayerActions, MapLayerState } from '../types';
 
 import { initLayer } from './layers';
@@ -51,6 +52,7 @@ export const getActions = (panel: GeomapPanel) => {
           config: cloneDeep(item.defaultOptions),
           location: item.showLocation ? { mode: FrameGeometrySourceMode.Auto } : undefined,
           tooltip: true,
+          ...(!item.hideOpacity && { opacity: defaultStyleConfig.opacity }),
         },
         false
       ).then((lyr) => {