Try the URL Redirector widget – https://appstore.home.mendix.com/link/app/113/ It can open a URL in a new tab.
When clicking a button in the datagrid, you would:
I am not sure if it will open multiple tabs (for different applications), you’ll need to test that out.
Hope that helps,
I never faced this requirement before but I think you will need to use the “Deeplink” module .
In your main page you will have to use a html snippet to put some script that will open and send some data related to the record to a new tab with target = _blank , then the in the deeplink you should handle the request.
Maybe there is a widget that helps you in the redirect in the appsotre.