Does esp32 controller support 2 or 3 SCO link?

[liujing]

I am trying to use esp32 realizinghe demo of supporting 2 SCO connections. And CONFIG_BTDM_CONTROLLER_BR_EDR_MAX_SYNC_CONN_EFF equals 2 indeed.But when it trying to create the second SCO link,there is a HCI error: Synchronous Connection Complete (status=10), which means the Controller has reached the limit to the number of synchronous connections .So I suppose the controller doesn't support more than 1 SCO link,right?