as a mechanical engineer i wrote lots of FEM codes in FORTRAN, i still do and honestly enjoy programming in it. the lack of graduates who know Fortran is a correct estimate. As far as I know, it is usually replaced by MATLAB and Python in our departments. Unfortunately, C++ is taught less.
i don't know much about future CPU technology or why it is likely that Fortran codes don't perform properly on GPU. but i know that NVIDIA takes too much time to provide CUDA-FORTRAN for windows. nothing happened after 4 years.
But it seems to me that the isolated Fortran programmers have recently become well connected. Look at the website [1], Package Manager or LFortran [2].
[1] https://fortran-lang.org/en/
[2] https://lfortran.org/