Nikon Z9 Raw files

Hi i have recently bought a Nikon Z9 and tried to hdr merge 3 raw photos but did not worked.
Could you please let me know if it is a matter of compatibility like currently with Lightroom that will improve
with a newer version or if you can propose any other way e.g transform with other software to tiff and merge the photos to SNS-HDR?
Thank you for any input.
Could you please let me know if it is a matter of compatibility like currently with Lightroom that will improve
with a newer version or if you can propose any other way e.g transform with other software to tiff and merge the photos to SNS-HDR?
Thank you for any input.