You can get the attestation certificate for Constella Wallet by calling https://api.constella.io/api/v1/config

You can get the AWS Root Certificate by visiting https://aws-nitro-enclaves.amazonaws.com/AWS_NitroEnclaves_Root-G1.zip

You can get the PCR values by building your own envlave image from here https://github.com/AlwaysHungrie/constella

Please use the given expiry date provided as Constella Wallet is in development mode and was running in a nitro enclave only till this point in time.