Is disabling password expiry for these OS admin accounts (eg., dradmin, root, ...) required from a PM product/support perspective.
All supported releases of Performance Management
The passwords for users that are used to run NetOps PM processes should be updated on any systems prior to the expiration.
Not doing this in a timely manner introduces the risk of NetOps PM processes to be blocked from running by the OS.
Depending upon the security posture of environment, you can choose to not expire those users (using passwords or ssh keys) to eliminate that risk, or to periodically update passwords/keys to prevent those users being disabled.