yum install mpich-3.2 not working on 8.1

We use mpich 3.2 in our software and have used the yum install mpich-3.2 call in past versions of RHEL, but it will not work in 8 or 8.1. It returns with Error: Unable to find a match: mpich-3.2

Did this change in 8 or is this version no longer available?