My advice is to get a TV Streamer as I have a high end Bose soundbar and it does not really work for hearing impairments.
Generally you will still need a soundbar anyway with a modern TV even for those with good hearing as the TV speakers are small and tinny sounding which defeats the purpose of having great OLED picture but rubbish sound.
Check the output of the LG to make sure that if you plug in a TV streamer to the headphone output that it is does not cut out the sound for other people as if you connect a soundbar you do it via the optical connection.
There are other configurations to be able to use both a streamer and a soundbar at the same time via an optical or HDMI Splitter. The big high street chain store salespeople are not in my opinion very knowledgeable on how these things are set up when you need to plug a couple of devices directly into the TV