Hi @wzkds how are you?
Did you try with this guide ? User Guide
In order for Transfers to be logged, you must use queue members with native devices (like SIP/1234) instead of the proxy Local channel, and you must also perform the transfer using the builtin transfer feature codes and not the transfer button on your phone, as in the later case, the most usual outcome is again a missing TRANSFER event in queue_log.
You can change queue member types in FreePBX by prepending an ‘S’ for SIP before the agent number in the queue configuration. However that change might break some other functionality/features for queue handling, so use it with extra care.