Bitcoin Core v0.21.1

`bitcoin-cli walletprocesspsbt` does not trigger a `wallet locked please enter passphrase` warning when using a wallet which holds private keys. To be clear I am experiencing this behavior when using the `default` wallet created by core.

The expected behavior would be to remind the user they are dealing with an encrypted wallet, since `walletprocesspsbt` attempts to access private keys to sign the psbt. It would be useful if a warning were present in the rpc response to remind the user they are dealing with an encrypted wallet. 
{RPCResult::Type::BOOL, "descriptors", "whether this wallet uses descriptors for scriptPubKey management"},
                    }},
                },
                RPCExamples{
                    HelpExampleCli("getwalletinfo", "")
            + HelpExampleRpc("getwalletinfo", "")
                },
        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
    std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
    if (!pwallet) return NullUniValue;
    
    
    pwallet->BlockUntilSyncedToCurrentChain();
    LOCK(pwallet->cs_wallet);
    UniValue obj(UniValue::VOBJ);
    size_t kpExternalSize = pwallet->KeypoolCountExternalKeys();
    const auto bal = GetBalance(*pwallet);
    int64_t kp_oldest = pwallet->GetOldestKeyPoolTime();
    obj.pushKV("walletname", pwallet->GetName());
    obj.pushKV("walletversion", pwallet->GetVersion());
    obj.pushKV("format", pwallet->GetDatabase().Format());
    obj.pushKV("balance", ValueFromAmount(bal.m_mine_trusted));
    obj.pushKV("unconfirmed_balance", ValueFromAmount(bal.m_mine_untrusted_pending));
    obj.pushKV("immature_balance", ValueFromAmount(bal.m_mine_immature));
    obj.pushKV("txcount",       (int)pwallet->mapWallet.size());
    if (kp_oldest > 0) {
        obj.pushKV("keypoololdest", kp_oldest);
    }
    obj.pushKV("keypoolsize", (int64_t)kpExternalSize);