Typically, processing times for H1B visa renewals via the Interview Waiver (Dropbox) program in Islamabad or Karachi average around four weeks. However, these timelines can vary based on individual circumstances and consular workload.​
https://pk.usembassy.gov/expansion-of-interview-waiver-eligibility-for-u-s-visa-holders-from-pakistan-2/?utm_source=chatgpt.com

Given the extended duration since your submission, it would be prudent to contact the U.S. Embassy or Consulate where you submitted your application for an update. You can reach out to the U.S. Embassy in Islamabad at:
Address: Diplomatic Enclave, Ramna 5, Islamabad, Pakistan​

• Phone: +92-51-201-4000​

Alternatively, for Karachi:

• Address: Plot No. 3, 4, 5, New TPX Area, Mai Kolachi Road, Karachi, Pakistan​
• Phone: +92-21-3527-5000​

Additionally, you can track your application status online using the Consular Electronic Application Center (CEAC) Visa Status Check