-> CY5677 can connect to only one BLE device at a time. It does not support connects to multiple BLE devices concurrently.
-> There is no option to auto connect to a BLE device from CySmart GUI. You need to select a particular device from the list of scan devices and send a connection request.
However, a custom firmware can be developed and flashed to CY5677 dongle to auto connect to a particular device on detection but in that case you would not be able to use the CySmart GUI straightforward.