I thought that may be the case because your device is missing the zigbee lock cluster ID I mentioned above, so that will definitely keep you from being able to use the DTH’s you’ve already tried. The lock commands are likely all done through Tuya’s specific zigbee cluster.
There are a few discussions in the community working on Edge drivers, so maybe one of the developers there can help put one together for you. Here’s one of them, but it doesn’t look like he’s addressing locks yet:
Other discussions as well: