Cannot access to secrets

Expo Application Services (EAS)
1

I want to pass a secret variable in the extra object (in app.config.js with process.env) so I can use it in my project ( google api key in this case )
But when I display the extra object (through Constants.expoConfig.extra.googleApiKey), the googleApiKey key is missing

Here’s my eas.json

{
	"build": {
		"staging": {
			"distribution": "internal",
			"channel": "staging",
			"env": {
				"APP_ENV": "staging"
			}
		},
		"production": {
			"channel": "production",
			"env": {
				"APP_ENV": "production"
			}
		}
	},
	"cli": {
		"promptToConfigurePushNotifications": false
	}
}

Here’s my app.config.js :

let config = {};

switch (process.env.APP_ENV) {
    case "production":
        appName = "APPNAME";
        bundleIdentifier = "com.appname.app";
        config.env = process.env.APP_ENV;
        config.googleApiKey = process.env.GOOGLE_API_KEY_PROD;
        break;

    case "staging":
        appName = "APPNAME (STAGING)";
        bundleIdentifier = "com.appname.staging";
        config.env = process.env.APP_ENV;
        config.googleApiKey = process.env.GOOGLE_API_KEY_STAGING;
        break;
   
}

export default () => ({
    name: appName,
    version: "1.0.0",
    .
    .
    .
    sdkVersion: "46.0.0",
    extra: {
        eas: {
            projectId: ...
        },
        ...config,
    },
});

Workflow : Managed

Build command : APP_ENV=staging eas build --profile staging

PS : when I type eas secret:list, I can see all of my secrets
They appears in the logs on my expo.dev console too when I start a build