ATM I use synth to build hdf5 with Fortran support. Would be great if the official package came with Fortran by default. Thanks!
I have just submitted PR 251894 to upgrade HDF5 to 1.12.0, with FORTRAN selected by default: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251894
Fixed as of 54ac4c3184668d200211012bb74e42f7720e30c5