IT Pros have 30 days from now to complete the MCSA: Office 365. If you leave it any later than 30th April, you will not be able to earn the MCSA: Office 36 certification. This applies to anyone who has taken either the 70-346 or 70-347 exam and is aiming to take the remaining exam for their MCSA.
If you are looking at options on what to do next, the Microsoft 365 certifications are taking over, I have put a guide together with more info on this - Microsoft 365 Training and Certification. Also if you are looking for something a bit different, edX and Microsoft have some great courses, including on Microsoft Teams, which you can try out for free: