I have created a new tenant and wanted to add an sms passwordless connection. I have used the API explorer to create it and I get it with get all connections as well.
Only difference seems to be enabled_clients with an existing tenant using sms passwordless connection.
However, at that point it is not clear to be what is the point I am missing here.
(I have no phone number to test this passwordless connection to test if it is already configured successfully.) Though I expect it to show up on the dashboard.
Note: Not using twilio but another provider, so I had to use the api instead of the web ui.