You should simply be able to put it into Zigbee mode and connect it with Homey via the Shelly Control app. Have been using it that way for months and it works great!
I have already tried that. Everything seems fine in shelly app. But when i pair it on homey, using Shelly control app, it only works for 2-3 min, and it seems the WS90 goes to sleep. Data is reading on shelly app, but not homey.
I am starting wondering if i am “out of range” for zigbee.