What product will allow me to transmit the tv's headphone audio out as 802.11 wifi to a cell phone's wifi receiver, as actual wi-fi, not bluetooth?

I would like buy a device to stream the tv's audio out signal, to a device that would convert and transmit it via 802.11 wifi, (not bluetooth). This way my cell phone's bluetooth is available for the bluetooth headset for listening. I have a multipoint headset, but the cellphone only functions correctly by automatically reducing the music-audio, when it receives the music-audio signal via wifi. When I use the headphone's extra bluetooth multipoint, connected to the tv, via an "audio to bluetooth transmitter", the cell phone will not reduce the tv's sound when a call comes in, and upon answering the call, the multipoint-tv connection from the ad-on bluetooth transmitter, is lost.

However, when listening to music from the internet via the cell phone's wi-fi receiver, the phone and headset perform perfectly. Thus it is the cell phone that performs the switching from music to a phone call, and back again, via the cellphone's own wi-fi receiver and internal circuitry. Is there a way to perhaps, send the tv's audio out, through an actual wifi router (perhaps one of your products) to the cell phone’s wi-fi receiver, just as though it came from the internet? And then play the music with the cellphone’s speaker, or with a headset paired with the cellphone.

Please suggest one of your products that will solve my problem. If you do not have such a device, would you please recommend one, or produce one in the future. It seems there is a real need out there for such a product.

And may I thank you in advance for your kind attention to this.