The current integration only supports limited functionallity.
IRCC-IP would provide full scope of functions and is supported by sony: https://pro-bravia.sony.net/develop/integrate/ircc-ip/overview/index.html
I took the time yesterday to map the whole API of my Bravia KDL-55W805B to a postman collection:
Most commands should work with newer models as well, but this is just to give a rough overview of what is available besides IRCC commands.
It would be very cool if we could also have the ability to change the picture mode via the braviatv-integration as the getSceneSetting and setSceneSetting methods are available on the API.