The setup is simple: |220->24 V adapter| with red/black output wires connecting to red/black input wires on the |dimmer/switch| with the red/yellow output wires connecting to the red/black input wires on the |LED strip|.
I want to control this setup also via a Zigbee switch/relay.
With the components you have, I don’t see any.
Your “wood penetrating” dimmer can not be used as input for those zigbee devices, so you can’t synch them together.
“Wood penetrating switch/dimmer” is basically a capacittive sensor that can be placed below the e.g. desk and controlled by tapping the top of the desk. “Wood penetrating” is not a correct term (sorry for not being more specific). But the sensor senses the gestures through materials.
You are correct. The blue box is a relay/switch device and not a dimmer. With it I would be able to turn on/off the LED in HA, while also use the existing capacitive sensor to turn on/off the LED as well as dim. (At least this is my assumption)
I want control the LED:
manually (switch/dimm) via a similar capacivive sensor that can sense gestures through material
First you need to open the touch dimmer casing to see if the PCB has jumpers to set it in simple switch mode.
If it’s like this you have some chances…