According to /usr/lib64/cmake/rocthrust/rocthrust-config.cmake installed by sci-libs/rocThrust-5.1.3 the include files should be in /usr/include/rocthrust but the package installs them in /usr/include/thrust instead.
Looks like src_prepare() intentionally changes the include dir to thrust via sed
Yes, this should be fixed. The newer ROCm headers do not need this hack anymore.