Looking at their career page, it looks like the general front end jobs pay $14-26/hr [1], is $29k-56k/yr if working full time. That’s around the median pay for 16-34, and 65+, year olds (according for Forbes [2]) in the US. Not amazing, but also not terrible, considering it doesn’t require any special skills or training. It also looks like they have some decent benefits (healthcare, 401k, education assistance, etc), considering it’s a retail job.
That's where they get you. Staffing less than 30 hours means you don't need to provide health insurance as an employer. This is what most retailers do for line level staff.
Roles like Store Manager, Leader, or Coach are basically corporate management gigs that require or "highly recommend" a Bachelors degree
[1] https://careers.walmart.com/stores-clubs/walmart-store-jobs
[2] https://www.forbes.com/advisor/business/average-salary-by-ag...