I asked this too:
https://forum.renoise.com/t/wave-chunk-support-instrument-chunk-sampler-chunk/40796
We indeed only read and write loop mode, start and end infos from the WAV RIFFs right now.
For root note, key-zone ranges and so on a format like soundfont might be the better choice.
Maybe the dev team will add this in the future. I got no response for my question, why renoise dont read note informations from wave files.