Comment by proberts
See the ACLU guidance referenced in a previous comment. There's no right to counsel during routine admission. The right only arises when arrested or being investigated for a crime.
See the ACLU guidance referenced in a previous comment. There's no right to counsel during routine admission. The right only arises when arrested or being investigated for a crime.
But you can (and should) ask if you're being detained on suspicion of a specific (criminal) offense, or not (e.g. officer wants to doublecheck your story, or background, or thinks there are irregularities), or (esp. for non-citizen) refusing to consent to unlocking your devices.
The answer to the above should give you some idea what's likely to happen, and what CBP has flagged you for, if anything.