STEM OPT extension

How do I apply for STEM OPT extension if I have not yet received my degree? I graduated in May 2024 completing all of my course requirements. I am paying my last semester tuition in monthly installments, the last installment being due in October 2026. Due to the balance of payment, the college has not sent me my diploma. I have been working full time on OPT since July 2024. I plan to apply for OPT extension this year. Is there anyway I could do it without the degree?