Applying to a language school

Hello guys. So I need some help with the language school document procedure. So currently I am in the final year of my Bachelor’s degree and am expected to graduate by the end of May 2026. I want to apply for the October intake as the application process starts this month. I want to know whether I can apply now and submit my graduation certificate after completing my degree, or if I must wait until graduation before applying. At present, I can provide my high school certificate and academic transcripts for all semesters, except for my current ongoing one. Thank you in advance!