Opening tailgate with foot movement stopped working after OEM trailer hitch install

[mersadk]

I have XC40 2022. I was able to open tailgate with foot movement.
Last week I had OEM electronic trailer hitch installed by Volvo dealership.
After that foot movement doesn't work any more.
I can't find any reference in the manual, is this expected after install or they broke something?

[Sodertalje]

All wires come together in one big connector behind the rear bumper, which was disconnected to add the hitch. Maybe you can check the connector at the foot movement sensor. It should work with a hitch installed.

[mersadk]

Is there anything I can do with Orbit to verify sensors are connected (or not connected) correctly?
Which module is responsible or this functionality?