Inquiry Regarding Building a Comprehensive National Biometric Model Using Tensorflow

Is it possible to create a biometric model for multi-category classification at the national level using SoftMax.

The goal is to build a model that can represent different biometric information of individuals across different classes and each class represents the biometric data of a single person. Most importantly, we plan not only to train the model initially, but also to continually update it as new individuals are added into the system.
I think we will reach a time when there will be millions of categories
Given the availability of significant resources, we believe this project could be feasible. I am keen to discuss this further and explore potential challenges.

Your insight on this matter would be greatly appreciated…

Best Regards,