The simulation and tests of EP 6.11 can be found here. The proposal was simulated by proposing, passing, executing, and asserting the difference between states after the ENS and USDC transfer operations. An extra validation will be required when the proposal gets onchain so the calldata can be verified against the description.
This can be checked by cloning the repo and running:
forge test --match-path src/ens/proposals/ep-6-11/* -vvvv