By definition, entry-level means no experience. Perhaps you mean relevant food experience but no QA experience? In which case, how is your pipeline from Ops into QA? Can you be leveraging that more?
Otherwise, I'd evaluate your job posting. Maybe you can tighten it?
I am a big fan of building connections to local community colleges and leveraging them as pipelines of entry-level talent.
In my experience, LinkedIn can be fairly invisible to the entry-level jobseeker. Since they're new to the job market, they often don't have a great sense of how to use it. And, since they don't yet have much to show in their LinkedIn profile, the algorithm struggles to put relevant jobs in front of them; your job gets lost in a gigantic and chaotic cloud of entry-level jobs.
If you require and/ or prefer some type of a credential (a degree, a certificate, etc), I'd suggest posting the job directly with whatever institutions award that type of credential.