This doesn't matter, because the company pays more attention to the professional skills and abilities of employees, and the requirements for graduation certificates are not too high. The company is willing to sign a formal labor contract with you, which shows that you are recognized. If you think the company has a good development prospect, you can sign it directly. As for graduation thesis and defense, it is easier. Just use weekends and evenings to finish your thesis, and it's no problem to ask for leave from the company when you graduate.