I have completed and passed all the 4 exams of Level 2 and have submitted the model history as well to be graded.
Request to please let me know what are next steps i need to do to get the certification and have the Anaplan Certified Model Builder certificate
You'll need to wait after you submitted your model history. Once the Community team has completed, they will enable the link to download the certificate for L2 Model Building.
For Certified Model Builder, you need to complete L1, L2 and Anaplan Way.
Refer to https://community.anaplan.com/t5/On-Demand-Courses/Certified-Model-Builder-Certificate/ta-p/64980
Hope that helps.