As great as reducing complexity is, I just don't see how it's possible to avoid implementing a service mesh in a FedRAMP moderate or high impact level environme

As great as reducing complexity is, I just don't see how it's possible to avoid implementing a service mesh in a FedRAMP moderate or high impact level environment. You essentially need to implement mTLS to meet SC-8(1), and to implement mTLS at scale, you need something like a service mesh. Are there other ways of going about this for FedRAMP moderate or high IL?