How to complete the input data?

I’m producing my own dataset with FEM.

The figure shows the combination of three features (PCB, chip, SJV), the blue part is the part I can generate, and the red part I can’t generate by software due to technical reasons.

I tried to use the ML model with only the blue part to predict the value of the red part, but the error is very large.

How can I complete the values of the red part?