Unfortunately, there are no examples in the Thread SDK that implements Thread + BLE central Multiprotocol. The s132 softdevice support both peripheral and central roles, so there should not be any issues to modify the examples to do scanning instead of advertising/connections. You can also follow the "Adding dynamic multiprotocol Thread support to BLE examples" section to add Thread support to the BLE central examples in the SDK.
Please make sure you follow the guidelines in the Dynamic multiprotocol documentation:
This method requires concurrent (time-multiplex) radio access. Due to the nature of this solution, when using the BLE Central role, the scanning interval and scanning period should be set as small as possible, to ensure that Thread data traffic is not blocked.
