It might not be applicable but we had our youngest son repeat Kindergarten this past year. He still has some struggles, but with the adhd-i diagnosis and support of his teachers it has been amazing to see the difference this year. The “free do-over” as we called it, gave him a chance to mature some and helped build some confidence.
Another possible course of action is to see what in-school intervention programs are available to help kids who are lagging behind. It may be wise to consider requesting a meeting with the principal and appropriate staff to see what options are available to get him back on track if he’s moved forward.