Laravel subdomains cannot be accessed directly

Route::get ('/', function () {

return view('home.welcome');

});
Route::group ([' domain ' = ' dashboard.homestead.app '], function () {

Route::get('/', function () {     return 'hello,world!';});

});
Dashboard.homestead.app has been configured in the homestead and hosts. However, when accessing Dashboard.homestead.app, the contents of the above route (Home.welcome) are still displayed.
But if it's written like this
Route::group ([' domain ' = ' dashboard.homestead.app '], function () {

Route::get('/test', function () {     return 'hello,world!';});

});
Access Dashboard.homestead.app/test is the normal display of Hello world.
Why is this? Can't directly access Dashboard.homestead.app get Hello world?

Reply content:

Route::get ('/', function () {

return view('home.welcome');

});
Route::group ([' domain ' = ' dashboard.homestead.app '], function () {

Route::get('/', function () {     return 'hello,world!';});

});
Dashboard.homestead.app has been configured in the homestead and hosts. However, when accessing Dashboard.homestead.app, the contents of the above route (Home.welcome) are still displayed.
But if it's written like this
Route::group ([' domain ' = ' dashboard.homestead.app '], function () {

Route::get('/test', function () {     return 'hello,world!';});

});
Access Dashboard.homestead.app/test is the normal display of Hello world.
Why is this? Can't directly access Dashboard.homestead.app get Hello world?

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