I would be surprised if a public school that already gave a full tuition scholarship would award a student with a $15k FAFSA EFC a SEOG grant or even work study.
I believe there is a EFC cutoff (or certain amount of unmet need) for these need based aid forms that schools use. To make sure the lowest EFC students with the highest need get the most help.
I might be wrong but we had a $6,000 EFC one year with two in school and got no SEOG, one kid got work study and the other one did not. Bot were offered subsidized loans and got a state grant.
If the income in 2018 and 2019 was not impacted by the job loss, they might not do a professional judgement to adjust EFC.