For URL redirection you can use URL Redirector widget or Open URL in Nanoflow Commons.
https://appstore.home.mendix.com/link/app/113/
https://docs.mendix.com/appstore/modules/nanoflow-commons
For custom URLs you can use either Deeplink or built in URL functionality.
https://appstore.home.mendix.com/link/app/43/
https://docs.mendix.com/refguide/page-properties#2-3-6-url
Hope this helps.