You'll need to put at least a DMR wildcard TG in the same scanlist as the DMR channel.
Problem with the DMR systems I monitor are that the DMR standard says that an ongoing voice call updates the TG info each superframe, which is at 360mS intervals to allow for "late entry" radios, and the scanner only stays something like 100mS on the DMR channel.
With the trunked DMR list you can set a dwell time to compensate for the short 100mS scantime and scan the channel several times to hopefully catch the start of the superframe.
Set up a new trunked system and add only that single channel and a TG wildcard and set dwell to 500mS.
Be aware that my TRX-2 are less sensitive than a Uniden and also needs a noise free signal to decode.
/Ubbe