Man pages matching name mpi in section 7:

MPI.7.en	debian 10 / lam-runtime
mpi.7.en	debian 10 / lam-runtime
MPI.7.en	debian 11 / lam-runtime
mpi.7.en	debian 11 / lam-runtime
MPI.7.en	debian 12 / lam-runtime
mpi.7.en	debian 12 / lam-runtime