No, USB is usually the easiest way to connect things. I didn't change any settings - the USB connection is set to the default, which allows for file transfers. With the Google MIDI library, the devices just show up under input/output ports and I can tap them to connect. For some unusual devices (or virtual MIDI ports), I have to uncheck the box at the bottom left that only displays MIDI devices. So you can try unchecking that just in case your device isn't MIDI class compliant and shows up in an unusual fashion.
I might suggest the mioXC https://www.iconnectivity.com/mioxc instead of a Roland UM-One, as it has a USB-C connector, but both of those require the 5 pin connectors, so only get that if your MIDI device has that as a connection type. I've had great success with my mioXM which also lets me connect things over WiFi with the iPad version of MobileSheets, but it's expensive.
Mike
I might suggest the mioXC https://www.iconnectivity.com/mioxc instead of a Roland UM-One, as it has a USB-C connector, but both of those require the 5 pin connectors, so only get that if your MIDI device has that as a connection type. I've had great success with my mioXM which also lets me connect things over WiFi with the iPad version of MobileSheets, but it's expensive.
Mike