“The EFC is < $3000” That means Pell eligible this year (so some need based aid).
If everything stays the same except no sibling in college EFC would be $6,000, so not Pell eligible assuming…
“The maximum expected family contribution (EFC) eligible for a Pell Grant for the 2020–21 Award Year is 5711 as compared to 5576 for the 2019–20 Award Year.”
https://ifap.ed.gov/electronic-announcements/030420OperImpleGuidFSA2021FedPGPayDisbSch
This tool might help you make estimates https://studentaid.gov/understand-aid/estimate
Here is the formula form https://ifap.ed.gov/sites/default/files/attachments/2019-10/2021EFCFormulaGuideOct2019UpdateAttach.pdf