Still better than Lenovo telling it's a feature to not setup proprietairy Linux drivers on devices who need them.
What’s “backlight oder hw acceleration” are you referring to refresh rate or something like PSR? I want to know if it’s something I need to check on my 9310...
I own a more recent Dell XPS 13, and the keyboard backlight support is indeed buggy - it needs a configuration patch to prevent it from turning on on logon.
Not sure what's exactly the hw acceleration. If they refer to the Intel integrated GPUs, the configuration is pretty much standard; up to 18.04 the only thing I needed to configure was the VSync (this was the same also for other laptops), but with 20.04, I didn't need anymore.