As I already said looks like you’re using darktable from master and it’s using mesa rusticl. So I don’t understand your question because you haven’t provided info on what your issue is (“DT is not able to utilise it” doesn’t help)
Rusticl may have some issues (artifacts) because it’s very young and depends on which mesa version you’re using.
Also read the above posts and suggestions (why are you using a custom opencl_device_priority and try with it cleaned up).
If you don’t want to mess with all of this one of the solutions is to use another distro (I happily use archlinux) that let you use amd rocm until rusticl is stable.