I applied for a backroom stocker position months ago. I passed the assessment but haven't heard back. Is there anything else zI can do?

Anytime you apply for any job,I would always do a follow-up in 1-2 weeks. To show you are interested in the position

Send them a letter stating your interest in the position and why they should hire you.

Which Walmart? My son applied at Wake Forest and they never got back to him. From the looks of that place they need as much help as they could possibly hire.

Call them, every other day. Let them know you want this job. The squeaky wheel gets the grease.

Call them and find out who the manager/supervisor of that area is and speak with them.

I'd give them a call