If you connect your sources to the soundbar you would still need to make the connection below to get sound from the TV tuner and apps to the soundbar.
The TV has three HDMI inputs according to the manual,
Connect your sources to the TV with HDMI.
Connect the SPDIF optical audio out of the TV to the optical input on the soundbar.
You may have to turn on the optical output, turn the TV speakers off, and change the audio output type in the TV menu.
Select the optical input on the soundbar.
Check the manuals for details.