New here, with a specific mission: Finding discrete codes for switching inputs on a new (2019) Philips 65OLED754 (or 55OLED754) TV, which uses the Philips-proprietary Saphi operating system. The original remote does not have them, and the complicated menu structure makes it impossible to correctly program a universal remote, such as my Harmony Elite.
User Aurelio007 on avforums.com recently posted the following codes form HDMI2-4, but did not find the code for HDMI1 (and possibly the other 'inputs' such as USB, internal network media player, etc). I have not been able to verify these codes.