In my smarthome I use Tuya zigbee 4 Gang switches, that were mounted above the normal Busch Jaeger switch, but the switches look different and you don't use the original switch anymore, so it's a bit obsolete, but wanted to keep it, in case of….
And to keep people from using the “old” switch, thus rendering your smart stuff useless I made a mountingbase for the Tuya Zigbee Smart switch 4gang TS004F and TS0044 (the 1, 2 and 3 gang should work also, they are the same size.
You have to remove the covers of the Busch Jaeger switch and get the clip part off the switchplate, mount the clip in the printed base and place it on the base in the wall.
Stick the Tuya switch on the mountbase.
You can also use it to cover the whole switchbase.
Based on: https://www.thingiverse.com/thing:4653241
The author hasn't provided the model origin yet.