What track does the Resource team at his middle school recommend? Provided that track meets admission requirements at the public universities in your state, your kid is fine.
Completing Algebra 2 is not a magical signal of mental development that shows that a student is ready for college. Algebra 2 is just the level of math skills that is approximately what would be needed to handle the demands of first year college courses in majors other than engineering, physics, or math. Even if it turns out that your kid doesn’t make it through Algebra 2 in high school, but meets the high school’s graduation requirements, and is otherwise capable, there are plenty of colleges and universities that will be happy to admit him, and that will offer a semester or two of remedial math to prepare him for whatever math graduation requirements they have.