RS520 How to make airplay work to an LG tv

RS 520 How to make airplay work to an LG tv.
I can use airplay with my iPhone and iPad to my LG TV.
There is an airplay button on the RS520 main-screen (top righthand) and when pushing I get the question the question if I want to switch it on.
I push YES and after that nothing happens.
It should then start looking for the LG TV that is waiting in the airplay mode and ask for the device number.
But again nothing,
I looked thru all the settings and gearwheels to find something, but nothing.
The button is there, but then…………………….?
Does anyone have suggestions?
Thanks

@Paulus

We apologize for any inconvenience caused.
Is there no AirPlay device search function on the TV?
There is no function for adding AirPlay devices on Rose devices.
If you search for AirPlay devices on your TV, RS520 will appear.