what outputs for audio does your tv have? what input does the receiver for your wireless headphones have?
given that wireless headphones are self powered and do not require power from the port - if they accept a 3.5mm input signal you should be able to use rca to 3.5mm. since the port is unpowered volume levels might be lower than using a headphone jack (depending on how the transmitter/receiver processes sound) however should be within acceptable levels. its a cheap fix as well.
they do make optical audio extractors (for optical out) or arc-compatible hdmi audio extractors (for extracting audio from hdmi-arc capable tvs) but these are much more expensive and honestly overkill if you have simple rca red/white outputs.