You can get a "school account" funded for private school, but the requirements are pretty strict.
https://education.azgovernor.gov/edu/arizona-school-choiceWall of text below.
Who Qualifies?
Pursuant to Arizona Statute, many Arizona families can utilize Empowerment Scholarship Accounts.
A "qualified student" means an Arizona resident who meets any of the following eligibility criteria:
Student has a disability with a current MET report, IEP, or 504 plan from an Arizona public school.
Student has a sibling that currently uses or previously utilized the ESA program.
Student resides (kindergarten only) in the boundary of or attends (grades 1-12) a school or school district that has a letter grade of D or F.
Student has received an Arizona Scholarship for Pupils with Disabilities, and the student's parent or guardian has not been removed from that program for noncompliance.
Student was a ward of the juvenile court, and either (i) was adopted or received permanent guardianship or (ii) is residing with a prospective permanent placement seeking to adopt or obtain permanent guardianship.
Student whose parent or guardian is on active military duty or was killed in the line of duty serving in the Armed Forces.
Student resides on an Indian Reservation.
Student whose parent or legal guardian is legally blind, deaf, or hard of hearing.