American government is expressly prohibited from depriving any person of their personal liberty without a specific judicial conviction of a specific crime, under due process of law.

You greatly overestimate what due process requires. It doesn’t require a criminal conviction before loss of liberty – if you can’t make bail, you’re in jail before your trial, and even if you do make bail, it comes with conditions that are in direct conflict with liberty. Temporary restraining orders are often granted before cases can be finally determined on the merits. You can be compelled to sit on a jury. These are things that were understood to be true even back in the 1700’s.

Compulsory education is slightly newer, being implemented from the mid-1800’s to the early 1900’s. But no court is going to find that it’s a due process violation to be forced to attend school, any more than a court is going to find compulsory jury duty to be involuntary servitude.

Quite surprising how few Americans see that… but shocking how few lawyers comprehend what should be blatantly obvious.

Compulsory school laws are a clear and severe ‘deprivation of liberty’ for all children. American government is expressly prohibited from depriving any person of their personal liberty without a specific judicial conviction of a specific crime, under due process of law.
(Re: 5th Amendment, Bill of Rights & identical prohibition in state constitutions.)

All children are condemned at birth to attend government schools (or government directed/approved substitutes) during the most formative years of their lives. And there is no appeal procedure. Details of this long incarceration are at the whim of government politicians and bureaucrats. 90% of Americans attend government schools.

Due process does not exist in the very concept of compulsory education, nor its bludgeon of truancy laws/edicts. Objectively, it’s a huge national scandal in a supposed free society.