Certified or not certified, it does not matter. What you should have is a complete package of knowledge in the respective solution from implementation and support project point of view.
Please note that there is no concept of fresher in sap world even if you are certified. It's hard to receive your first break in sap but it's not impossible.
You can even start your career in sap as an end-user or tester then move into the next phase. There are a lot of opportunities, just know how to get it. Keep on working hard until you get it.
Sap mm interview questions: https://intellipaat.com/blog/interview-question/sap-material-management-interview-questions/