At least for Apple, they claim the iPhone (at least devices post-checkm8) has not been compromised. iCloud is required to comply with records requests, but the data isn’t in iCloud the feds can’t get it. Even with checkm8, the Secure Enclave still has not been compromised.

If they were in bed with the feds, the FBI/NYPD wouldn’t keep asking them for keys that Apple doesn’t have.