B1/B2 Refusal for parents

Hello, my mom’s B1/B2 visitor visa Dropbox renewal was refused in New Delhi in April 2022. No reason was given - no white or yellow slip. When contacted the consulate later, they said it’s under final processing. This was back in June. No updates since. Any idea how to proceed? Thank you for reading. Please help if you can!
Note: I had applied for an extension of stay while she was in the US during covid times in May 2021 which is still pending USCIS approval. Biometrics were completed.

You can send email to the consulate processing the application with candidate details and follow up.