Found a DTH that runs the 2 gang version (maybe 3 as well, not checked) having received mine in the post. Use the main DTH and child device (below), when initially added it shows as a ‘thing’. Change the DTH from ‘thing’ to the main handler below and re-add through classic (don’t delete before re-adding). It also automatically adds the second switch after adding.
Below double switch, kitchen light and dining room light:
