Question about Logitech Harmony Elite

I have asked Sunrise about this and so far they have not found a solution. The Swisscom IR receiver does not work for me. Does anyone have a solution?

it doesn't work, the box is bluetooth and the elite infrared and wifi

See https://www.swisscom.ch/content...
The TV box does not have an infrared receiver, this can be adapted with a dongle.

good evening, at home it does not work with the sunrise tv box uhd. Why?

Yes, this should work, as the UHD TV belongs to the "TV" category and the box belongs to either the "TV receiver" or "SAT receiver" category.