MarsSeed [1] filed a deletion request for hdf5-mpich [2]: Long-broken and abandoned pkg from 2020. Last and only comment is from that year.
Arch/extra repo carries the default build of hdf5. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/hdf5-mpich/
