Welcome to the Roku Community!
We can certainly understand your concern that you want to know if the Roku Streambar Pro will work when using PS5.
To answer your question, when the Roku Streambar Pro is connected to a TV that is connected to another device such as PS5. It will provide premium high-quality audio from your TV's built-in tuner and enhance the audio experience of any device connected to your TV.
We recommend taking a look at the detailed instructions regarding this setup and to learn more about the requirements to prevent audio issues, please visit our Support page here: How to use a game console or Blu-ray player with your Roku Streambar, Roku Streambar Pro, or Roku Sm...
We hope that we have addressed your question appropriately, but reply to this message if you have any additional concerns and questions, and we will gladly follow up.