Set featureLevel: "compatibility" when compatibility=1 is enabled

src/common/util/navigator_gpu.ts

@@ -43,6 +43,9 @@ export function setDefaultRequestAdapterOptions(options: GPURequestAdapterOption
     throw new Error('must call setDefaultRequestAdapterOptions before getGPU');
   }
   defaultRequestAdapterOptions = { ...options };
+  // MAINTENANCE_TODO: remove this once compatibilityMode is removed.
+  defaultRequestAdapterOptions.featureLevel =
+    'compatibilityMode' in options && options.compatibilityMode ? 'compatibility' : 'core';
 }
 
 export function getDefaultRequestAdapterOptions() {