That sounded like a GenAI bot's answer ;)
Anyway, I'll stick to IR and won't put any more effort into it.
Sure, I could throw a RasPi into the mix to emulate the RFX9600 but that would only make the solution more complex.
I'm using IR for the "usual" controls (obviously, by design, the TV is not hidden away in a cupboard, so IR is fine) and for the bunch of commands that aren't available through IR, I trigger a script on my home lab server which is running 24/7 anyway.
The last few weeks this has been working fine - as the TV is basically only a monitor and I don't need any of the smart features, I don't need to touch the TV controls a lot.

Sebastian