3yr old

Good morning! I had a question answered a few weeks ago regarding my 3yr old son not sleeping. We have made him a bedtime box and have a timer for him to keep at nap time. He hasn’t had much improvement. I feel like he is getting lost in our homeschool. He is acting out and at the end of the day really struggling due to lack of sleep. I’m looking for suggestions to keep him engaged and included.
Thank you always and God bless you and all listening!