RFCOMM is old Bluetooth, not BLE.
Nordic has a serial-over-ble profile, but it is not standard like RFCOMM.
I mean, sure there are still rough edges, but it's not like rs232 over Juliet is some widely supported standard.
There are Android apps that support serial over ble
Indeed… a fact making me really sad about BLE :(. The Nordic profile might become widespread enough to become de-facto standard, but AFAIK isn't quite widespread enough yet, i.e. people are still homebrewing almost the same thing(?)