It is not possible to switch from profile to Broadcaster and vice versa in the program. But in the code, you can advertisement the device in Broadcasting mode by changing the advertisement parameters by modifying the CYBLE_GAPP_DISC_PARAM_T structure in the CYBLE_EVT_STACK_ON event.
The broadcaster mode uses the below parameters:
1. Discovery mode -> non-discoverable.
2. Advertising type -> non connectable undirected advertising/scannable undirected advertising.
3. Advertisement and scan response packets (Clear the service and connection related data).
Please let me know if this helps.